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-3x+2y=10
4y=8/4
y=2
3x+4=-2
3x=2/3
x=2/3
b
4x+5y=-4 / (-6)
6x+7y=-6 / (4)
-24x-30y=24
24x+28y=24
2y=48/2
y=24
-24x-720=24
-720-24=24x/24
-3-1=x
x=-4
3x + 2y = -2
-3+2y=10 |:2
3x+2y=-2
-1,5+y=5
3x+2y=-2
y=5+1,5x
3x+2(5+1,5x)=-2
y=5+1,5x
3x+10+3x=-2
y=5+1,5x
6x=-12
y=5+1,5x
x=-2
y=5+1,5*(-2)
x=-2
y=2