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(x+66)+(2x)=180
We move all terms to the left:
(x+66)+(2x)-(180)=0
We add all the numbers together, and all the variables
2x+(x+66)-180=0
We get rid of parentheses
2x+x+66-180=0
We add all the numbers together, and all the variables
3x-114=0
We move all terms containing x to the left, all other terms to the right
3x=114
x=114/3
x=38
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