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(2x+4)=82
We move all terms to the left:
(2x+4)-(82)=0
We get rid of parentheses
2x+4-82=0
We add all the numbers together, and all the variables
2x-78=0
We move all terms containing x to the left, all other terms to the right
2x=78
x=78/2
x=39
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