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(28+4x)=72
We move all terms to the left:
(28+4x)-(72)=0
We add all the numbers together, and all the variables
(4x+28)-72=0
We get rid of parentheses
4x+28-72=0
We add all the numbers together, and all the variables
4x-44=0
We move all terms containing x to the left, all other terms to the right
4x=44
x=44/4
x=11
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