Overview: 3 questions will be solved this time.Among them
☆3 equations
[ 1/3 Equation]
Work: Find the solution of equation 65*0.45+(x*0.55) = 140 .
Question type: Equation
Solution:Original question: | 65 | × | 9 20 | + | ( | x | × | 11 20 | ) | = | 140 |
Left side of the equation = | 117 4 | + | ( | x | × | 11 20 | ) |
The equation is transformed into :
Remove the bracket on the left of the equation:
Left side of the equation = | 117 4 | + | x | × | 11 20 |
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.
Convert the result to decimal form :
[ 2/3 Equation]
Work: Find the solution of equation 75*0.45+(x*0.55) = 170 .
Question type: Equation
Solution:Original question: | 75 | × | 9 20 | + | ( | x | × | 11 20 | ) | = | 170 |
Left side of the equation = | 135 4 | + | ( | x | × | 11 20 | ) |
The equation is transformed into :
Remove the bracket on the left of the equation:
Left side of the equation = | 135 4 | + | x | × | 11 20 |
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.
Convert the result to decimal form :
[ 3/3 Equation]
Work: Find the solution of equation 220*0.45+(x*0.55) = 170 .
Question type: Equation
Solution:Original question: | 220 | × | 9 20 | + | ( | x | × | 11 20 | ) | = | 170 |
Left side of the equation = | 99 | + | ( | x | × | 11 20 | ) |
The equation is transformed into :
Remove the bracket on the left of the equation:
Left side of the equation = | 99 | + | x | × | 11 20 |
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.
Convert the result to decimal form :
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