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    Current location:Equations > Monovariate Equation > The history of univariate equation calculation > Answer

    Overview: 1 questions will be solved this time.Among them
           ☆1 equations

[ 1/1 Equation]
    Work: Find the solution of equation (0.7178/(1.8889-x))+(0.15/(1-x))+(0.21/(0.7778-x))+(0.0844/(0.4222-x)) = 0.75 .
    Question type: Equation
    Solution:Original question:
     (
3589
5000
÷ (
18889
10000
- x )) + (
3
20
÷ (1 - x )) + (
21
100
÷ (
3889
5000
- x )) + (
211
2500
÷ (
2111
5000
- x )) =
3
4
    Remove a bracket on the left of the equation::
     
3589
5000
÷ (
18889
10000
- x ) + (
3
20
÷ (1 - x )) + (
21
100
÷ (
3889
5000
- x )) + (
211
2500
÷ (
2111
5000
- x )) =
3
4
     Multiply both sides of the equation by:(
18889
10000
- x )
     
3589
5000
+ (
3
20
÷ (1 - x ))(
18889
10000
- x ) + (
21
100
÷ (
3889
5000
- x ))(
18889
10000
- x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x ) =
3
4
(
18889
10000
- x )
    Remove a bracket on the left of the equation:
     
3589
5000
+
3
20
÷ (1 - x ) × (
18889
10000
- x ) + (
21
100
÷ (
3889
5000
- x ))(
18889
10000
- x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x ) =
3
4
(
18889
10000
- x )
    Remove a bracket on the right of the equation::
     
3589
5000
+
3
20
÷ (1 - x ) × (
18889
10000
- x ) + (
21
100
÷ (
3889
5000
- x ))(
18889
10000
- x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x ) =
3
4
×
18889
10000
-
3
4
x
    The equation is reduced to :
     
3589
5000
+
3
20
÷ (1 - x ) × (
18889
10000
- x ) + (
21
100
÷ (
3889
5000
- x ))(
18889
10000
- x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x ) =
56667
40000
-
3
4
x
     Multiply both sides of the equation by:(1 - x )
     
3589
5000
(1 - x ) +
3
20
(
18889
10000
- x ) + (
21
100
÷ (
3889
5000
- x ))(
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x ) =
56667
40000
(1 - x ) -
3
4
x (1 - x )
    Remove a bracket on the left of the equation:
     
3589
5000
× 1 -
3589
5000
x +
3
20
(
18889
10000
- x ) + (
21
100
÷ (
3889
5000
- x ))(
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x ) =
56667
40000
(1 - x ) -
3
4
x (1 - x )
    Remove a bracket on the right of the equation::
     
3589
5000
× 1 -
3589
5000
x +
3
20
(
18889
10000
- x ) + (
21
100
÷ (
3889
5000
- x ))(
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x ) =
56667
40000
× 1 -
56667
40000
x -
3
4
x (1 - x )
    The equation is reduced to :
     
3589
5000
-
3589
5000
x +
3
20
(
18889
10000
- x ) + (
21
100
÷ (
3889
5000
- x ))(
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x ) =
56667
40000
-
56667
40000
x -
3
4
x (1 - x )
    Remove a bracket on the left of the equation:
     
3589
5000
-
3589
5000
x +
3
20
×
18889
10000
-
3
20
x + (
21
100
÷ (
3889
5000
- x ))(
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x ) =
56667
40000
-
56667
40000
x -
3
4
x (1 - x )
    Remove a bracket on the right of the equation::
     
3589
5000
-
3589
5000
x +
3
20
×
18889
10000
-
3
20
x + (
21
100
÷ (
3889
5000
- x ))(
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x ) =
56667
40000
-
56667
40000
x -
3
4
x × 1 +
3
4
x x
    The equation is reduced to :
     
3589
5000
-
3589
5000
x +
56667
200000
-
3
20
x + (
21
100
÷ (
3889
5000
- x ))(
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x ) =
56667
40000
-
56667
40000
x -
3
4
x +
3
4
x x
    The equation is reduced to :
     
200227
200000
-
4339
5000
x + (
21
100
÷ (
3889
5000
- x ))(
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x ) =
56667
40000
-
86667
40000
x +
3
4
x x
    Remove a bracket on the left of the equation:
     
200227
200000
-
4339
5000
x +
21
100
÷ (
3889
5000
- x ) × (
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x ) =
56667
40000
-
86667
40000
x +
3
4
x x
     Multiply both sides of the equation by:(
3889
5000
- x )
     
200227
200000
(
3889
5000
- x ) -
4339
5000
x (
3889
5000
- x ) +
21
100
(
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x )(
3889
5000
- x ) =
56667
40000
(
3889
5000
- x ) -
86667
40000
x (
3889
5000
- x ) +
3
4
x x (
3889
5000
- x )
    Remove a bracket on the left of the equation:
     
200227
200000
×
3889
5000
-
200227
200000
x -
4339
5000
x (
3889
5000
- x ) +
21
100
(
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x )(
3889
5000
- x ) =
56667
40000
(
3889
5000
- x ) -
86667
40000
x (
3889
5000
- x ) +
3
4
x x (
3889
5000
- x )
    Remove a bracket on the right of the equation::
     
200227
200000
×
3889
5000
-
200227
200000
x -
4339
5000
x (
3889
5000
- x ) +
21
100
(
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x )(
3889
5000
- x ) =
56667
40000
×
3889
5000
-
56667
40000
x -
86667
40000
x (
3889
5000
- x ) +
3
4
x x (
3889
5000
- x )
    The equation is reduced to :
     
778682803
1000000000
-
200227
200000
x -
4339
5000
x (
3889
5000
- x ) +
21
100
(
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x )(
3889
5000
- x ) =
220377963
200000000
-
56667
40000
x -
86667
40000
x (
3889
5000
- x ) +
3
4
x x (
3889
5000
- x )
    Remove a bracket on the left of the equation:
     
778682803
1000000000
-
200227
200000
x -
4339
5000
x ×
3889
5000
+
4339
5000
x x +
21
100
(
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x )(
3889
5000
- x ) =
220377963
200000000
-
56667
40000
x -
86667
40000
x (
3889
5000
- x ) +
3
4
x x (
3889
5000
- x )
    Remove a bracket on the right of the equation::
     
778682803
1000000000
-
200227
200000
x -
4339
5000
x ×
3889
5000
+
4339
5000
x x +
21
100
(
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x )(
3889
5000
- x ) =
220377963
200000000
-
56667
40000
x -
86667
40000
x ×
3889
5000
+
86667
40000
x x +
3
4
x x (
3889
5000
- x )
    The equation is reduced to :
     
778682803
1000000000
-
200227
200000
x -
16874371
25000000
x +
4339
5000
x x +
21
100
(
18889
10000
- x )(1 - x ) + (
211
2500
÷ (
2111
5000
- x ))(
18889
10000
- x )(1 - x )(
3889
5000
- x ) =
220377963
200000000
-
56667
40000
x -
337047963
200000000
x +
86667
40000
x x +
3
4
x x (
3889
5000
- x )

    The solution of the equation:
        x1≈-0.308703 , keep 6 decimal places
        x2≈0.517097 , keep 6 decimal places
        x3≈0.913479 , keep 6 decimal places
        x4≈1.417428 , keep 6 decimal places
    
    There are 4 solution(s).


解程的详细方法请参阅:《方程的解法》



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