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(-11+131x)=120
We move all terms to the left:
(-11+131x)-(120)=0
We add all the numbers together, and all the variables
(131x-11)-120=0
We get rid of parentheses
131x-11-120=0
We add all the numbers together, and all the variables
131x-131=0
We move all terms containing x to the left, all other terms to the right
131x=131
x=131/131
x=1
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