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On line Solution of Monovariate Equation：
    Input any unary equation directly, and then click the "Next" button to obtain the solution of the equation.
    It supports equations that contain mathematical functions.
    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 (8950+20+X)*（3.9%-3.1%） = 4X .
    Question type: Equation
    Solution:Original question:
     (8950 + 20 + X )(
39
1000
 −
31
1000
) = 4 X
    Remove the bracket on the left of the equation:
     Left side of the equation = 8950(
39
1000
 −
31
1000
) + 20(
39
1000
 −
31
1000
) + X (
39
1000
 −
31
1000
)
                                             = 8950 ×
39
1000
 − 8950 ×
31
1000
 + 20(
39
1000
 −
31
1000
) + X (
39
1000
 −
31
1000
)
                                             =
6981
20
 −
5549
20
 + 20(
39
1000
 −
31
1000
) + X (
39
1000
 −
31
1000
)
                                             =
358
5
 + 20(
39
1000
 −
31
1000
) + X (
39
1000
 −
31
1000
)
                                             =
358
5
 + 20 ×
39
1000
 − 20 ×
31
1000
 + X (
39
1000
 −
31
1000
)
                                             =
358
5
 +
39
50
 −
31
50
 + X (
39
1000
 −
31
1000
)
                                             =
1794
25
 + X (
39
1000
 −
31
1000
)
                                             =
1794
25
 + X ×
39
1000
 − X ×
31
1000
                                             =
1794
25
 +
1
125
 X
    The equation is transformed into :
     
1794
25
 +
1
125
 X = 4 X

    Transposition :
     
1
125
 X − 4 X = -
1794
25

    Combine the items on the left of the equation:
      -
499
125
 X = -
1794
25

    By shifting the terms and changing the symbols on toth sides of the equation, we obtain :
     
1794
25
 =
499
125
 X

    If the left side of the equation is equal to the right side, then the right side must also be equal to the left side, that is :
     
499
125
 X =
1794
25

    The coefficient of the unknown number is reduced to 1 :
      X =
1794
25
 ÷
499
125
        =
1794
25
 ×
125
499
        = 1794 ×
5
499

    We obtained :
      X =
8970
499
    This is the solution of the equation.

    Convert the result to decimal form :
      X = 17.975952



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