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x+(-15x)=8
We move all terms to the left:
x+(-15x)-(8)=0
We get rid of parentheses
x-15x-8=0
We add all the numbers together, and all the variables
-14x-8=0
We move all terms containing x to the left, all other terms to the right
-14x=8
x=8/-14
x=-4/7
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