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(x)+(x)+(2x+30)=180
We move all terms to the left:
(x)+(x)+(2x+30)-(180)=0
We add all the numbers together, and all the variables
2x+(2x+30)-180=0
We get rid of parentheses
2x+2x+30-180=0
We add all the numbers together, and all the variables
4x-150=0
We move all terms containing x to the left, all other terms to the right
4x=150
x=150/4
x=37+1/2
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