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(7x+180)=9
We move all terms to the left:
(7x+180)-(9)=0
We get rid of parentheses
7x+180-9=0
We add all the numbers together, and all the variables
7x+171=0
We move all terms containing x to the left, all other terms to the right
7x=-171
x=-171/7
x=-24+3/7
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