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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
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Work: Find the solution of equation 7*4500+5*(1-0.75x)*(1+2.5x) = (4500*7+2500*5)*(1-5x/11) .
Question type: Equation
Solution:Original question:
| 7 | × | 4500 | + | 5 | ( | 1 | − | 3 4 | x | ) | ( | 1 | + | 5 2 | x | ) | = | ( | 4500 | × | 7 | + | 2500 | × | 5 | ) | ( | 1 | − | 5 | x | ÷ | 11 | ) |
| Left side of the equation = | 31500 | + | 5 | ( | 1 | − | 3 4 | x | ) | ( | 1 | + | 5 2 | x | ) |
| 31500 | + | 5 | ( | 1 | − | 3 4 | x | ) | ( | 1 | + | 5 2 | x | ) | = | ( | 4500 | × | 7 | + | 2500 | × | 5 | ) | ( | 1 | − | 5 | x | ÷ | 11 | ) |
| Left side of the equation = | 31500 | + | 5 | × | 1 | ( | 1 | + | 5 2 | x | ) | − | 5 | × | 3 4 | x | ( | 1 | + | 5 2 | x | ) |
| = | 31500 | + | 5 | ( | 1 | + | 5 2 | x | ) | − | 15 4 | x | ( | 1 | + | 5 2 | x | ) |
| = | 31500 | + | 5 | × | 1 | + | 5 | × | 5 2 | x | − | 15 4 | x | ( | 1 | + | 5 2 | x | ) |
| = | 31500 | + | 5 | + | 25 2 | x | − | 15 4 | x | ( | 1 | + | 5 2 | x | ) |
| = | 31505 | + | 25 2 | x | − | 15 4 | x | ( | 1 | + | 5 2 | x | ) |
| = | 31505 | + | 25 2 | x | − | 15 4 | x | × | 1 | − | 15 4 | x | × | 5 2 | x |
| = | 31505 | + | 25 2 | x | − | 15 4 | x | − | 75 8 | x | x |
| = | 31505 | + | 35 4 | x | − | 75 8 | x | x |
| 31505 | + | 35 4 | x | − | 75 8 | x | x | = | ( | 4500 | × | 7 | + | 2500 | × | 5 | ) | ( | 1 | − | 5 | x | ÷ | 11 | ) |
| Right side of the equation = | 4500 | × | 7 | ( | 1 | − | 5 | x | ÷ | 11 | ) | + | 2500 | × | 5 | ( | 1 | − | 5 | x | ÷ | 11 | ) |
| = | 31500 | ( | 1 | − | 5 | x | ÷ | 11 | ) | + | 12500 | ( | 1 | − | 5 | x | ÷ | 11 | ) |
| = | 31500 | × | 1 | − | 31500 | × | 5 | x | ÷ | 11 | + | 12500 | ( | 1 | − | 5 | x | ÷ | 11 | ) |
| = | 31500 | − | 157500 11 | x | + | 12500 | ( | 1 | − | 5 | x | ÷ | 11 | ) |
| = | 31500 | − | 157500 11 | x | + | 12500 | × | 1 | − | 12500 | × | 5 | x | ÷ | 11 |
| = | 31500 | − | 157500 11 | x | + | 12500 | − | 62500 11 | x |
| = | 44000 | − | 20000 | x |
| 31505 | + | 35 4 | x | − | 75 8 | x | x | = | 44000 | − | 20000 | x |
x≈0.624660 , 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》