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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 38.75+（x-15）÷20 = 39+（x-9）÷31 .
    Question type: Equation
    Solution:Original question:
     
155
4
 + ( x − 15) ÷ 20 = 39 + ( x − 9) ÷ 31
    Remove the bracket on the left of the equation:
     Left side of the equation =
155
4
 + x ×
1
20
 − 15 ×
1
20
                                             =
155
4
 + x ×
1
20
 −
3
4
                                             = 38 +
1
20
 x
    The equation is transformed into :
     38 +
1
20
 x = 39 + ( x − 9) ÷ 31
    Remove the bracket on the right of the equation:
     Right side of the equation = 39 + x ×
1
31
 − 9 ×
1
31
                                               = 39 + x ×
1
31
 −
9
31
                                               =
1200
31
 +
1
31
 x
    The equation is transformed into :
     38 +
1
20
 x =
1200
31
 +
1
31
 x

    Transposition :
     
1
20
 x −
1
31
 x =
1200
31
 − 38

    Combine the items on the left of the equation:
     
11
620
 x =
1200
31
 − 38

    Combine the items on the right of the equation:
     
11
620
 x =
22
31

    The coefficient of the unknown number is reduced to 1 :
      x =
22
31
 ÷
11
620
        =
22
31
 ×
620
11
        = 2 × 20

    We obtained :
      x = 40
    This is the solution of the equation.



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