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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 (X*700+(10-X)*1200)*0.69-(10-X)*1080 = 420 .
    Question type: Equation
    Solution:Original question:
     ( X × 700 + (10 − X ) × 1200) ×
69
100
 − (10 − X ) × 1080 = 420
    Remove the bracket on the left of the equation:
     Left side of the equation = X × 700 ×
69
100
 + (10 − X ) × 1200 ×
69
100
 − (10 − X ) × 1080
                                             = X × 483 + (10 − X ) × 828 − (10 − X ) × 1080
                                             = 483 X + 10 × 828 − X × 828 − (10 − X ) × 1080
                                             = 483 X + 8280 − X × 828 − (10 − X ) × 1080
                                             = - 345 X + 8280 − (10 − X ) × 1080
                                             = - 345 X + 8280 − 10 × 1080 + X × 1080
                                             = - 345 X + 8280 − 10800 + X × 1080
                                             = 735 X − 2520
    The equation is transformed into :
     735 X − 2520 = 420

    Transposition :
     735 X = 420 + 2520

    Combine the items on the right of the equation:
     735 X = 2940

    The coefficient of the unknown number is reduced to 1 :
      X = 2940 ÷ 735
        = 2940 ×
1
735
        = 4 × 1

    We obtained :
      X = 4
    This is the solution of the equation.



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