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(8x-31)+(6x+3)=180
We move all terms to the left:
(8x-31)+(6x+3)-(180)=0
We get rid of parentheses
8x+6x-31+3-180=0
We add all the numbers together, and all the variables
14x-208=0
We move all terms containing x to the left, all other terms to the right
14x=208
x=208/14
x=14+6/7
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