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2x-5+2x+7-3x=8
x+2=8
x=6
b)
2y-2+3y-5y+2-y=4
-y=4
y=-4
2=8
x=6
b)2y-2+3y-5y+2-y=4
-y=4
y=-4
1x=8+5-7
x=6
spr:12-5+12+7-18=8
8=8
2y-2+3y-5y+2-y=4
2y+3y-5y-y=4+2-2
-y=4
y=-4
spr: -8-2-12+20+2+4=4
-22+26=4
4=4