solve the following equation .3 (x+1)=12+4 (x-1)
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3(x+1)=12+4 (x-1)
3x+3=12+4x-4
3x+3+4=12+4x
3x+7=12+4x
7=12+4x-3x
7-12=x
-5=x
x=-5
3x+3=12+4x-4
3x+3+4=12+4x
3x+7=12+4x
7=12+4x-3x
7-12=x
-5=x
x=-5
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