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 （x+20)*【0.0035+（20-x）:18】 = (20-x)*【0.0049+（20+x）:18】 .
Question type: Equation
Solution:Original question:
| ( | x | + | 20 | ) | ( | 7 2000 | + | ( | 20 | − | x | ) | ÷ | 18 | ) | = | ( | 20 | − | x | ) | ( | 49 10000 | + | ( | 20 | + | x | ) | ÷ | 18 | ) |
| Left side of the equation = | x | ( | 7 2000 | + | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 20 | ( | 7 2000 | + | ( | 20 | − | x | ) | ÷ | 18 | ) |
| = | x | × | 7 2000 | + | x | ( | 20 | − | x | ) | ÷ | 18 | + | 20 | ( | 7 2000 | + | ( | 20 | − | x | ) | ÷ | 18 | ) |
| = | 7 2000 | x | + | x | × | 20 | × | 1 18 | − | x | x | × | 1 18 | + | 20 | ( | 7 2000 | + | ( | 20 | − | x | ) | ÷ | 18 | ) |
| = | 7 2000 | x | + | x | × | 10 9 | − | x | x | × | 1 18 | + | 20 | ( | 7 2000 | + | ( | 20 | − | x | ) | ÷ | 18 | ) |
| = | 20063 18000 | x | − | x | x | × | 1 18 | + | 20 | ( | 7 2000 | + | ( | 20 | − | x | ) | ÷ | 18 | ) |
| = | 20063 18000 | x | − | x | x | × | 1 18 | + | 20 | × | 7 2000 | + | 20 | ( | 20 | − | x | ) | ÷ | 18 |
| = | 20063 18000 | x | − | x | x | × | 1 18 | + | 7 100 | + | 10 9 | ( | 20 | − | x | ) |
| = | 20063 18000 | x | − | x | x | × | 1 18 | + | 7 100 | + | 10 9 | × | 20 | − | 10 9 | x |
| = | 20063 18000 | x | − | x | x | × | 1 18 | + | 7 100 | + | 200 9 | − | 10 9 | x |
| = | 7 2000 | x | − | x | x | × | 1 18 | + | 20063 900 |
7 2000 | x | − | x | x | × | 1 18 | + | 20063 900 | = | ( | 20 | − | x | ) | ( | 49 10000 | + | ( | 20 | + | x | ) | ÷ | 18 | ) |
| Right side of the equation = | 20 | ( | 49 10000 | + | ( | 20 | + | x | ) | ÷ | 18 | ) | − | x | ( | 49 10000 | + | ( | 20 | + | x | ) | ÷ | 18 | ) |
| = | 20 | × | 49 10000 | + | 20 | ( | 20 | + | x | ) | ÷ | 18 | − | x | ( | 49 10000 | + | ( | 20 | + | x | ) | ÷ | 18 | ) |
| = | 49 500 | + | 10 9 | ( | 20 | + | x | ) | − | x | ( | 49 10000 | + | ( | 20 | + | x | ) | ÷ | 18 | ) |
| = | 49 500 | + | 10 9 | × | 20 | + | 10 9 | x | − | x | ( | 49 10000 | + | ( | 20 | + | x | ) | ÷ | 18 | ) |
| = | 49 500 | + | 200 9 | + | 10 9 | x | − | x | ( | 49 10000 | + | ( | 20 | + | x | ) | ÷ | 18 | ) |
| = | 100441 4500 | + | 10 9 | x | − | x | ( | 49 10000 | + | ( | 20 | + | x | ) | ÷ | 18 | ) |
| = | 100441 4500 | + | 10 9 | x | − | x | × | 49 10000 | − | x | ( | 20 | + | x | ) | ÷ | 18 |
| = | 100441 4500 | + | 99559 90000 | x | − | x | ( | 20 | + | x | ) | × | 1 18 |
| = | 100441 4500 | + | 99559 90000 | x | − | x | × | 20 | × | 1 18 | − | x | x | × | 1 18 |
| = | 100441 4500 | + | 99559 90000 | x | − | x | × | 10 9 | − | x | x | × | 1 18 |
| = | 100441 4500 | − | 49 10000 | x | − | x | x | × | 1 18 |
7 2000 | x | − | x | x | × | 1 18 | + | 20063 900 | = | 100441 4500 | − | 49 10000 | x | − | x | x | × | 1 18 |
| x= | 10 3 |
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》