Overview: 3 questions will be solved this time.Among them
☆3 equations
[ 1/3 Equation]
Work: Find the solution of equation 2.4x-2.4*0.5 = 6 .
Question type: Equation
Solution:Original question:| Left side of the equation = | 12 5 | x | − | 6 5 |
The equation is transformed into :
Transposition :
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.
[ 2/3 Equation]
Work: Find the solution of equation 2/5x+0.2x = 3.6 .
Question type: Equation
Solution:Original question:| Left side of the equation = | 2 5 | x | + | 1 5 | x |
The equation is transformed into :
The coefficient of the unknown number is reduced to 1 :
We obtained :
This is the solution of the equation.
[ 3/3 Equation]
Work: Find the solution of equation x/(5/4) = 9/2/(15/8) .
Question type: Equation
Solution:Original question:| | x | ÷ | ( | 5 | ÷ | 4 | ) | = | 9 | ÷ | 2 | ÷ | ( | 15 | ÷ | 8 | ) |
| Multiply both sides of the equation by: | ( | 5 | ÷ | 4 | ) | , | ( | 15 | ÷ | 8 | ) |
| | x | ( | 15 | ÷ | 8 | ) | = | 9 | ÷ | 2 | × | ( | 5 | ÷ | 4 | ) |
Remove a bracket on the left of the equation::
| | x | × | 15 | ÷ | 8 | = | 9 | ÷ | 2 | × | ( | 5 | ÷ | 4 | ) |
Remove a bracket on the right of the equation::
| | x | × | 15 | ÷ | 8 | = | 9 | ÷ | 2 | × | 5 | ÷ | 4 |
The equation is reduced to :
The coefficient of the unknown number is reduced to 1 :
We obtained :
This is the solution of the equation.
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