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180=12x+15+15x
We move all terms to the left:
180-(12x+15+15x)=0
We add all the numbers together, and all the variables
-(27x+15)+180=0
We get rid of parentheses
-27x-15+180=0
We add all the numbers together, and all the variables
-27x+165=0
We move all terms containing x to the left, all other terms to the right
-27x=-165
x=-165/-27
x=6+1/9
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