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(13x-9)+(4x-11)+(2x+7)=180
We move all terms to the left:
(13x-9)+(4x-11)+(2x+7)-(180)=0
We get rid of parentheses
13x+4x+2x-9-11+7-180=0
We add all the numbers together, and all the variables
19x-193=0
We move all terms containing x to the left, all other terms to the right
19x=193
x=193/19
x=10+3/19
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