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It supports mathematical functions (including trigonometric functions).
Current location：Mathematical operation > History of Mathematical Computation > Answer
Overview: 1 questions will be solved this time.Among them
☆1 equations
[ 1/1 Equation]
Work: Find the solution of equation （36-4x）（20-3x） = 36*20*（1-1/5） .
Question type: Equation
Solution:Original question:
Remove the bracket on the left of the equation:
The equation is transformed into :
The equation is transformed into :
Remove the bracket on the right of the equation:
The equation is transformed into :
The solution of the equation:
x1≈0.807587 , keep 6 decimal places
x2≈14.859080 , keep 6 decimal places
There are 2 solution(s).
解程的详细方法请参阅：《方程的解法》
☆1 equations
[ 1/1 Equation]
Work: Find the solution of equation （36-4x）（20-3x） = 36*20*（1-1/5） .
Question type: Equation
Solution:Original question:
| ( | 36 | − | 4 | x | ) | ( | 20 | − | 3 | x | ) | = | 36 | × | 20 | ( | 1 | − | 1 | ÷ | 5 | ) |
| Left side of the equation = | 36 | ( | 20 | − | 3 | x | ) | − | 4 | x | ( | 20 | − | 3 | x | ) |
| = | 36 | × | 20 | − | 36 | × | 3 | x | − | 4 | x | ( | 20 | − | 3 | x | ) |
| = | 720 | − | 108 | x | − | 4 | x | ( | 20 | − | 3 | x | ) |
| = | 720 | − | 108 | x | − | 4 | x | × | 20 | + | 4 | x | × | 3 | x |
| = | 720 | − | 108 | x | − | 80 | x | + | 12 | x | x |
| = | 720 | − | 188 | x | + | 12 | x | x |
| 720 | − | 188 | x | + | 12 | x | x | = | 36 | × | 20 | ( | 1 | − | 1 | ÷ | 5 | ) |
| Right side of the equation = | 720 | ( | 1 | − | 1 | ÷ | 5 | ) |
| 720 | − | 188 | x | + | 12 | x | x | = | 720 | ( | 1 | − | 1 | ÷ | 5 | ) |
| Right side of the equation = | 720 | × | 1 | − | 720 | × | 1 | ÷ | 5 |
| = | 720 | − | 144 |
| = | 576 |
| 720 | − | 188 | x | + | 12 | x | x | = | 576 |
The solution of the equation:
x1≈0.807587 , keep 6 decimal places
x2≈14.859080 , keep 6 decimal places
There are 2 solution(s).
解程的详细方法请参阅：《方程的解法》