Equations
Fold
Math OP
Unfold
Linear algebra
Unfold
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 （24.39+x）/（30+x） = 90% .
Question type: Equation
Solution:Original question:
| ( | 2439 100 | + | x | ) | ÷ | ( | 30 | + | x | ) | = | 90 100 |
| Multiply both sides of the equation by: | ( | 30 | + | x | ) |
| ( | 2439 100 | + | x | ) | = | 90 100 | ( | 30 | + | x | ) |
2439 100 | + | x | = | 90 100 | ( | 30 | + | x | ) |
2439 100 | + | x | = | 90 100 | × | 30 | + | 90 100 | x |
2439 100 | + | x | = | 27 | + | 90 100 | x |
Transposition :
| x | − | 90 100 | x | = | 27 | − | 2439 100 |
Combine the items on the left of the equation:
1 10 | x | = | 27 | − | 2439 100 |
Combine the items on the right of the equation:
1 10 | x | = | 261 100 |
The coefficient of the unknown number is reduced to 1 :
| x | = | 261 100 | ÷ | 1 10 |
| = | 261 100 | × | 10 |
| = | 261 10 | × | 1 |
We obtained :
| x | = | 261 10 |
Convert the result to decimal form :
| x | = | 26.1 |