1)5x-7=3x+12
2x=19
x=9.5
2)2x+2=x+2
x=0
3)10x+15=15-3x
4)15x-20=28x-7
-13=13x
x=-1
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1)5x-7=3x+12
2x=19
x=9.5
2)2x+2=x+2
x=0
3)10x+15=15-3x
x=0
4)15x-20=28x-7
-13=13x
x=-1