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180=90-30-x+67
We move all terms to the left:
180-(90-30-x+67)=0
We add all the numbers together, and all the variables
-(-1x+127)+180=0
We get rid of parentheses
1x-127+180=0
We add all the numbers together, and all the variables
x+53=0
We move all terms containing x to the left, all other terms to the right
x=-53
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