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(2x+1)=77
We move all terms to the left:
(2x+1)-(77)=0
We get rid of parentheses
2x+1-77=0
We add all the numbers together, and all the variables
2x-76=0
We move all terms containing x to the left, all other terms to the right
2x=76
x=76/2
x=38
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