Overview: 3 questions will be solved this time.Among them
☆3 equations
[ 1/3 Equation]
Work: Find the solution of equation X1+X2+2X3-X4 = 0 .
Question type: Equation
Solution:Original question: | X | × | 1 | + | X | × | 2 | + | 2 | X | × | 3 | − | X | × | 4 | = | 0 |
Left side of the equation = | X | × | 1 | + | X | × | 2 | + | 6 | X | − | X | × | 4 |
The equation is transformed into :
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 2X1+X2+X3-X4 = 0 .
Question type: Equation
Solution:Original question: | 2 | X | × | 1 | + | X | × | 2 | + | X | × | 3 | − | X | × | 4 | = | 0 |
Left side of the equation = | 2 | X | + | X | × | 2 | + | X | × | 3 | − | X | × | 4 |
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 2X1+2X2+X3+2X4 = 0 .
Question type: Equation
Solution:Original question: | 2 | X | × | 1 | + | 2 | X | × | 2 | + | X | × | 3 | + | 2 | X | × | 4 | = | 0 |
Left side of the equation = | 2 | X | + | 4 | X | + | X | × | 3 | + | 8 | 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.
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