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x+(2x+30)=220
We move all terms to the left:
x+(2x+30)-(220)=0
We get rid of parentheses
x+2x+30-220=0
We add all the numbers together, and all the variables
3x-190=0
We move all terms containing x to the left, all other terms to the right
3x=190
x=190/3
x=63+1/3
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