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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 200×0.6x+100×0.3x+100×（-0.3x） = 15000 .
Question type: Equation
Solution:Original question:
The equation is transformed into :
Remove the bracket on the left of the equation:
The equation is transformed into :
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 200×0.6x+100×0.3x+100×（-0.3x） = 15000 .
Question type: Equation
Solution:Original question:
| 200 | × | 3 5 | x | + | 100 | × | 3 10 | x | + | 100 | ( | - | 3 10 | x | ) | = | 15000 |
| Left side of the equation = | 120 | x | + | 30 | x | + | 100 | ( | - | 3 10 | x | ) |
| = | 150 | x | + | 100 | ( | - | 3 10 | x | ) |
| 150 | x | + | 100 | ( | - | 3 10 | x | ) | = | 15000 |
| Left side of the equation = | 150 | x | − | 100 | × | 3 10 | x |
| = | 150 | x | − | 30 | x |
| = | 120 | x |
| 120 | x | = | 15000 |
The coefficient of the unknown number is reduced to 1 :
| x | = | 15000 | ÷ | 120 |
| = | 15000 | × | 1 120 |
| = | 125 | × | 1 |
We obtained :
| x | = | 125 |