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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.
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 130%x*90%+120%*（200-x）-200 = 27.7 .
Question type: Equation
Solution:Original question:
130 100 | x | × | 90 100 | + | 120 100 | ( | 200 | − | x | ) | − | 200 | = | 277 10 |
| Left side of the equation = | 117 100 | x | + | 120 100 | ( | 200 | − | x | ) | − | 200 |
117 100 | x | + | 120 100 | ( | 200 | − | x | ) | − | 200 | = | 277 10 |
| Left side of the equation = | 117 100 | x | + | 120 100 | × | 200 | − | 120 100 | x | − | 200 |
| = | 117 100 | x | + | 240 | − | 120 100 | x | − | 200 |
| = | - | 3 100 | x | + | 40 |
| - | 3 100 | x | + | 40 | = | 277 10 |
Transposition :
| - | 3 100 | x | = | 277 10 | − | 40 |
Combine the items on the right of the equation:
| - | 3 100 | x | = | - | 123 10 |
By shifting the terms and changing the symbols on toth sides of the equation, we obtain :
123 10 | = | 3 100 | 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 :
3 100 | x | = | 123 10 |
The coefficient of the unknown number is reduced to 1 :
| x | = | 123 10 | ÷ | 3 100 |
| = | 123 10 | × | 100 3 |
| = | 41 | × | 10 |
We obtained :
| x | = | 410 |