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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 (0.2+x)×(400+x/5) = 0.15 .
    Question type: Equation
    Solution:Original question:
     (
1
5
+ x )(400 + x ÷ 5) =
3
20
    Remove the bracket on the left of the equation:
     Left side of the equation =
1
5
(400 + x ÷ 5) + x (400 + x ÷ 5)
                                             =
1
5
× 400 +
1
5
x ÷ 5 + x (400 + x ÷ 5)
                                             = 80 +
1
25
x + x (400 + x ÷ 5)
                                             = 80 +
1
25
x + x × 400 + x x ÷ 5
                                             = 80 +
10001
25
x + x x ×
1
5
    The equation is transformed into :
     80 +
10001
25
x + x x ×
1
5
=
3
20

    
        x≈-0.199625 , 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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