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90-(2x-8)=180
We move all terms to the left:
90-(2x-8)-(180)=0
We add all the numbers together, and all the variables
-(2x-8)-90=0
We get rid of parentheses
-2x+8-90=0
We add all the numbers together, and all the variables
-2x-82=0
We move all terms containing x to the left, all other terms to the right
-2x=82
x=82/-2
x=-41
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