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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 520*1000000 = 13.8*x*456*（420-x/2）+13.8*（1000-456）*100*（420-100/2） .
    Question type: Equation
    Solution:Original question:
     520 × 1000000 =
69
5
 x × 456(420 − x ÷ 2) +
69
5
(1000 − 456) × 100(420 − 100 ÷ 2)
     Left side of the equation = 520000000
    The equation is transformed into :
     520000000 =
69
5
 x × 456(420 − x ÷ 2) +
69
5
(1000 − 456) × 100(420 − 100 ÷ 2)
     Right side of the equation =
31464
5
 x (420 − x ÷ 2) + 1380(1000 − 456)(420 − 100 ÷ 2)
    The equation is transformed into :
     520000000 =
31464
5
 x (420 − x ÷ 2) + 1380(1000 − 456)(420 − 100 ÷ 2)
    Remove the bracket on the right of the equation:
     Right side of the equation =
31464
5
 x × 420 −
31464
5
 x x ÷ 2 + 1380(1000 − 456)(420 − 100 ÷ 2)
                                               = 2642976 x −
15732
5
 x x + 1380(1000 − 456)(420 − 100 ÷ 2)
                                               = 2642976 x −
15732
5
 x x + 1380 × 1000(420 − 100 ÷ 2) − 1380 × 456(420 − 100 ÷ 2)
                                               = 2642976 x −
15732
5
 x x + 1380000(420 − 100 ÷ 2) − 629280(420 − 100 ÷ 2)
                                               = 2642976 x −
15732
5
 x x + 1380000 × 420 − 1380000 × 100 ÷ 2 − 629280(420 − 100 ÷ 2)
                                               = 2642976 x −
15732
5
 x x + 579600000 − 69000000 − 629280(420 − 100 ÷ 2)
                                               = 2642976 x −
15732
5
 x x + 510600000 − 629280(420 − 100 ÷ 2)
                                               = 2642976 x −
15732
5
 x x + 510600000 − 629280 × 420 + 629280 × 100 ÷ 2
                                               = 2642976 x −
15732
5
 x x + 510600000 − 264297600 + 31464000
                                               = 2642976 x −
15732
5
 x x + 277766400
    The equation is transformed into :
     520000000 = 2642976 x −
15732
5
 x x + 277766400

    
        x≈196.747908 , keep 6 decimal places    
    There are 1 solution(s).

解一元一次方程的详细方法请参阅：《一元一次方程的解法》


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