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x+(7-2x)=11
We move all terms to the left:
x+(7-2x)-(11)=0
We add all the numbers together, and all the variables
x+(-2x+7)-11=0
We get rid of parentheses
x-2x+7-11=0
We add all the numbers together, and all the variables
-1x-4=0
We move all terms containing x to the left, all other terms to the right
-x=4
x=4/-1
x=-4
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