x+2y+2=0and 3x+2y-2=0
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x+2y=-2.........(1)×3
3x+2y=2..........(2)×1
3x+6y=-6..........(3)
3x+2y=2...........(4)
subtracting(3) from (4)sign changes
3x+6y=-6
3x+2y=2
- - -
4y=-8
y=-2
putting value of y
x+2y=-2
x+2×-2=-2
x=2
3x+2y=2..........(2)×1
3x+6y=-6..........(3)
3x+2y=2...........(4)
subtracting(3) from (4)sign changes
3x+6y=-6
3x+2y=2
- - -
4y=-8
y=-2
putting value of y
x+2y=-2
x+2×-2=-2
x=2
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