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3x=7-2y
x=(7-2y)/3
4x-3y=-2
4(7-2y/3)-3y=-2
28-8y/3-3y=-2
28-8y-9y=-6
28-17y=-6
17y=34
y=2
3x+2y=7
3x+2(2)=7
3x+4=7
3x=3
x=1