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-14x+2(x-3)+9x=6x-87
We move all terms to the left:
-14x+2(x-3)+9x-(6x-87)=0
We add all the numbers together, and all the variables
-5x+2(x-3)-(6x-87)=0
We multiply parentheses
-5x+2x-(6x-87)-6=0
We get rid of parentheses
-5x+2x-6x+87-6=0
We add all the numbers together, and all the variables
-9x+81=0
We move all terms containing x to the left, all other terms to the right
-9x=-81
x=-81/-9
x=+9
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