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Enter the mathematical formula directly and click the "Next" button to get the calculation answer.
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 X+21 = X÷3+9 .
Question type: Equation
Solution:Original question:
Transposition :
Combine the items on the left of the equation:
Combine the items on the right of the equation:
The coefficient of the unknown number is reduced to 1 :
We obtained :
This is the solution of the equation.
☆1 equations
[ 1/1 Equation]
Work: Find the solution of equation X+21 = X÷3+9 .
Question type: Equation
Solution:Original question:
| X | + | 21 | = | X | ÷ | 3 | + | 9 |
Transposition :
| X | − | 1 3 | X | = | 9 | − | 21 |
Combine the items on the left of the equation:
2 3 | X | = | 9 | − | 21 |
Combine the items on the right of the equation:
2 3 | X | = | - | 12 |
The coefficient of the unknown number is reduced to 1 :
| X | = | - | 12 | ÷ | 2 3 |
| = | - | 12 | × | 3 2 |
| = | - | 6 | × | 3 |
We obtained :
| X | = | - | 18 |