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8x+11=-7x-15
We move all terms to the left:
8x+11-(-7x-15)=0
We get rid of parentheses
8x+7x+15+11=0
We add all the numbers together, and all the variables
15x+26=0
We move all terms containing x to the left, all other terms to the right
15x=-26
x=-26/15
x=-1+11/15
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