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180=19+x+x
We move all terms to the left:
180-(19+x+x)=0
We add all the numbers together, and all the variables
-(2x+19)+180=0
We get rid of parentheses
-2x-19+180=0
We add all the numbers together, and all the variables
-2x+161=0
We move all terms containing x to the left, all other terms to the right
-2x=-161
x=-161/-2
x=80+1/2
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