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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 （15+X）/（5+X） = 2 .
Question type: Equation
Solution:Original question:
Remove a bracket on the left of the equation:：
Remove a bracket on the right of the equation:：
The equation is reduced to :
Transposition :
i.e.
Combine the items on the left of the equation:
Combine the items on the right of the equation:
By shifting the terms and changing the symbols on toth sides of the equation, we obtain :
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 :
This is the solution of the equation.
This is the solution of the equation.
☆1 equations
[ 1/1 Equation]
Work: Find the solution of equation （15+X）/（5+X） = 2 .
Question type: Equation
Solution:Original question:
| ( | 15 | + | X | ) | ÷ | ( | 5 | + | X | ) | = | 2 |
| Multiply both sides of the equation by: | ( | 5 | + | X | ) |
| ( | 15 | + | X | ) | = | 2 | ( | 5 | + | X | ) |
| 15 | + | X | = | 2 | ( | 5 | + | X | ) |
| 15 | + | X | = | 2 | × | 5 | + | 2 | X |
| 15 | + | X | = | 10 | + | 2 | X |
Transposition :
| X | − | 2 | X | = | 10 | − | 15 |
| - | X | = | 10 | − | 15 |
Combine the items on the left of the equation:
| - | X | = | 10 | − | 15 |
Combine the items on the right of the equation:
| - | X | = | - | 5 |
By shifting the terms and changing the symbols on toth sides of the equation, we obtain :
| 5 | = | 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 :
| X | = | 5 |
This is the solution of the equation.