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15+12=-15x+2x
We move all terms to the left:
15+12-(-15x+2x)=0
We add all the numbers together, and all the variables
-(-13x)+15+12=0
We add all the numbers together, and all the variables
-(-13x)+27=0
We get rid of parentheses
13x+27=0
We move all terms containing x to the left, all other terms to the right
13x=-27
x=-27/13
x=-2+1/13
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