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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 {3.14×(50+80×5.5+90x)+3.14×0.8×0.65×[387.4+25×(16.9+17.8x)]}/(9.5+x)×(5.5+x) = 3851.931+2262x .
    Question type: Equation
    Solution:Original question:
     (
157
50
(50 + 80 ×
11
2
+ 90 x ) +
157
50
×
4
5
×
13
20
(
1937
5
+ 25(
169
10
+
89
5
x ))) ÷ (
19
2
+ x ) × (
11
2
+ x ) =
3851931
1000
+ 2262 x
     Multiply both sides of the equation by:(
19
2
+ x )
     (
157
50
(50 + 80 ×
11
2
+ 90 x ) +
157
50
×
4
5
×
13
20
(
1937
5
+ 25(
169
10
+
89
5
x )))(
11
2
+ x ) =
3851931
1000
(
19
2
+ x ) + 2262 x (
19
2
+ x )
    Remove a bracket on the left of the equation::
     
157
50
(50 + 80 ×
11
2
+ 90 x )(
11
2
+ x ) +
157
50
×
4
5
×
13
20
(
1937
5
+ 25(
169
10
+
89
5
x ))(
11
2
+ x ) =
3851931
1000
(
19
2
+ x ) + 2262 x (
19
2
+ x )
    Remove a bracket on the right of the equation::
     
157
50
(50 + 80 ×
11
2
+ 90 x )(
11
2
+ x ) +
157
50
×
4
5
×
13
20
(
1937
5
+ 25(
169
10
+
89
5
x ))(
11
2
+ x ) =
3851931
1000
×
19
2
+
3851931
1000
x + 2262 x (
19
2
+ x )
    The equation is reduced to :
     
157
50
(50 + 80 ×
11
2
+ 90 x )(
11
2
+ x ) +
2041
1250
(
1937
5
+ 25(
169
10
+
89
5
x ))(
11
2
+ x ) =
73186689
2000
+
3851931
1000
x + 2262 x (
19
2
+ x )
    Remove a bracket on the left of the equation:
     
157
50
× 50(
11
2
+ x ) +
157
50
× 80 ×
11
2
(
11
2
+ x ) +
157
50
× 90 x (
11
2
+ x ) +
2041
1250
=
73186689
2000
+
3851931
1000
x + 2262 x (
19
2
+ x )
    Remove a bracket on the right of the equation::
     
157
50
× 50(
11
2
+ x ) +
157
50
× 80 ×
11
2
(
11
2
+ x ) +
157
50
× 90 x (
11
2
+ x ) +
2041
1250
=
73186689
2000
+
3851931
1000
x + 2262 x ×
19
2
+ 2262 x x
    The equation is reduced to :
     157(
11
2
+ x ) +
6908
5
(
11
2
+ x ) +
1413
5
x (
11
2
+ x ) +
2041
1250
(
1937
5
+ 25(
169
10
+
89
5
x ))(
11
2
+ x ) =
73186689
2000
+
3851931
1000
x + 21489 x + 2262 x x
    The equation is reduced to :
     157(
11
2
+ x ) +
6908
5
(
11
2
+ x ) +
1413
5
x (
11
2
+ x ) +
2041
1250
(
1937
5
+ 25(
169
10
+
89
5
x ))(
11
2
+ x ) =
73186689
2000
+
25340931
1000
x + 2262 x x
    Remove a bracket on the left of the equation:
     157 ×
11
2
+ 157 x +
6908
5
(
11
2
+ x ) +
1413
5
x (
11
2
+ x ) +
2041
1250
(
1937
5
+ 25(
169
10
+
89
5
x ))(
11
2
+ x ) =
73186689
2000
+
25340931
1000
x + 2262 x x
    The equation is reduced to :
     
1727
2
+ 157 x +
6908
5
(
11
2
+ x ) +
1413
5
x (
11
2
+ x ) +
2041
1250
(
1937
5
+ 25(
169
10
+
89
5
x ))(
11
2
+ x ) =
73186689
2000
+
25340931
1000
x + 2262 x x
    Remove a bracket on the left of the equation:
     
1727
2
+ 157 x +
6908
5
×
11
2
+
6908
5
x +
1413
5
x (
11
2
+ x ) +
2041
1250
(
1937
5
+ 25(
169
10
+
89
5
x )) =
73186689
2000
+
25340931
1000
x + 2262 x x
    The equation is reduced to :
     
1727
2
+ 157 x +
37994
5
+
6908
5
x +
1413
5
x (
11
2
+ x ) +
2041
1250
(
1937
5
+ 25(
169
10
+
89
5
x ))(
11
2
+ x ) =
73186689
2000
+
25340931
1000
x + 2262 x x
    The equation is reduced to :
     
84623
10
+
7693
5
x +
1413
5
x (
11
2
+ x ) +
2041
1250
(
1937
5
+ 25(
169
10
+
89
5
x ))(
11
2
+ x ) =
73186689
2000
+
25340931
1000
x + 2262 x x
    Remove a bracket on the left of the equation:
     
84623
10
+
7693
5
x +
1413
5
x ×
11
2
+
1413
5
x x +
2041
1250
(
1937
5
+ 25(
169
10
+
89
5
x ))(
11
2
+ x ) =
73186689
2000
+
25340931
1000
x + 2262 x x
    The equation is reduced to :
     
84623
10
+
7693
5
x +
15543
10
x +
1413
5
x x +
2041
1250
(
1937
5
+ 25(
169
10
+
89
5
x ))(
11
2
+ x ) =
73186689
2000
+
25340931
1000
x + 2262 x x
    The equation is reduced to :
     
84623
10
+
30929
10
x +
1413
5
x x +
2041
1250
(
1937
5
+ 25(
169
10
+
89
5
x ))(
11
2
+ x ) =
73186689
2000
+
25340931
1000
x + 2262 x x
    Remove a bracket on the left of the equation:
     
84623
10
+
30929
10
x +
1413
5
x x +
2041
1250
×
1937
5
(
11
2
+ x ) +
2041
1250
× 25(
169
10
+
89
5
x ) =
73186689
2000
+
25340931
1000
x + 2262 x x
    The equation is reduced to :
     
84623
10
+
30929
10
x +
1413
5
x x +
3953417
6250
(
11
2
+ x ) +
2041
50
(
169
10
+
89
5
x )(
11
2
+ x ) =
73186689
2000
+
25340931
1000
x + 2262 x x
    Remove a bracket on the left of the equation:
     
84623
10
+
30929
10
x +
1413
5
x x +
3953417
6250
×
11
2
+
3953417
6250
x +
2041
50
(
169
10
+
89
5
x ) =
73186689
2000
+
25340931
1000
x + 2262 x x
    The equation is reduced to :
     
84623
10
+
30929
10
x +
1413
5
x x +
43487587
12500
+
3953417
6250
x +
2041
50
(
169
10
+
89
5
x )(
11
2
+ x ) =
73186689
2000
+
25340931
1000
x + 2262 x x
    The equation is reduced to :
     
149266337
12500
+
11642021
3125
x +
1413
5
x x +
2041
50
(
169
10
+
89
5
x )(
11
2
+ x ) =
73186689
2000
+
25340931
1000
x + 2262 x x
    Remove a bracket on the left of the equation:
     
149266337
12500
+
11642021
3125
x +
1413
5
x x +
2041
50
×
169
10
(
11
2
+ x ) +
2041
50
×
89
5
x =
73186689
2000
+
25340931
1000
x + 2262 x x
    The equation is reduced to :
     
149266337
12500
+
11642021
3125
x +
1413
5
x x +
344929
500
(
11
2
+ x ) +
181649
250
x (
11
2
+ x ) =
73186689
2000
+
25340931
1000
x + 2262 x x
    Remove a bracket on the left of the equation:
     
149266337
12500
+
11642021
3125
x +
1413
5
x x +
344929
500
×
11
2
+
344929
500
x +
181649
250
x =
73186689
2000
+
25340931
1000
x + 2262 x x

    The solution of the equation:
        x1≈-12.141980 , keep 6 decimal places
        x2≈-1.371186 , keep 6 decimal places
    
    There are 2 solution(s).


解程的详细方法请参阅:《方程的解法》



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