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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 2（9-2X1） = 3（11-2X2） .
Question type: Equation
Solution:Original question:
| 2 | ( | 9 | − | 2 | X | × | 1 | ) | = | 3 | ( | 11 | − | 2 | X | × | 2 | ) |
| Left side of the equation = | 2 | × | 9 | − | 2 | × | 2 | X | × | 1 |
| = | 18 | − | 4 | X |
| 18 | − | 4 | X | = | 3 | ( | 11 | − | 2 | X | × | 2 | ) |
| Right side of the equation = | 3 | × | 11 | − | 3 | × | 2 | X | × | 2 |
| = | 33 | − | 12 | X |
| 18 | − | 4 | X | = | 33 | − | 12 | X |
Transposition :
| - | 4 | X | + | 12 | X | = | 33 | − | 18 |
Combine the items on the left of the equation:
| 8 | X | = | 33 | − | 18 |
Combine the items on the right of the equation:
| 8 | X | = | 15 |
The coefficient of the unknown number is reduced to 1 :
| X | = | 15 | ÷ | 8 |
| = | 15 | × | 1 8 |
We obtained :
| X | = | 15 8 |
Convert the result to decimal form :
| X | = | 1.875 |