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-73+7x=135+15x
We move all terms to the left:
-73+7x-(135+15x)=0
We add all the numbers together, and all the variables
7x-(15x+135)-73=0
We get rid of parentheses
7x-15x-135-73=0
We add all the numbers together, and all the variables
-8x-208=0
We move all terms containing x to the left, all other terms to the right
-8x=208
x=208/-8
x=-26
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