Equations
Unfold
Math OP
Fold
Linear algebra
Unfold
Mathematical calculation：
Enter the mathematical formula directly and click the "Next" button to get the calculation answer.
It supports mathematical functions (including trigonometric functions).
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: 2 questions will be solved this time.Among them
☆1 equations
☆1 arithmetic calculations
[1/2 Formula]
Work: Calculate the value of equation 8/10-1 .
Question type: Mathematical calculation
Solution:
8/10-1
=0.8-1
=-0.2
Answer:8/10-1=-0.2
[ 2/2 Equation]
Work: Find the solution of equation 8/X-1 = -0.2 .
Question type: Equation
Solution:Original question:
| 8 | ÷ | X | − | 1 | = | - | 1 5 |
| Multiply both sides of the equation by: | X |
| 8 | − | 1 | X | = | - | 1 5 | X |
Transposition :
| - | 1 | X | + | 1 5 | X | = | - | 8 |
Combine the items on the left of the equation:
| - | 4 5 | X | = | - | 8 |
By shifting the terms and changing the symbols on toth sides of the equation, we obtain :
| 8 | = | 4 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 :
4 5 | X | = | 8 |
The coefficient of the unknown number is reduced to 1 :
| X | = | 8 | ÷ | 4 5 |
| = | 8 | × | 5 4 |
| = | 2 | × | 5 |
We obtained :
| X | = | 10 |