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(4x-5)+(3x-3)+90=180
We move all terms to the left:
(4x-5)+(3x-3)+90-(180)=0
We add all the numbers together, and all the variables
(4x-5)+(3x-3)-90=0
We get rid of parentheses
4x+3x-5-3-90=0
We add all the numbers together, and all the variables
7x-98=0
We move all terms containing x to the left, all other terms to the right
7x=98
x=98/7
x=14
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