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(3x+5)=13
We move all terms to the left:
(3x+5)-(13)=0
We get rid of parentheses
3x+5-13=0
We add all the numbers together, and all the variables
3x-8=0
We move all terms containing x to the left, all other terms to the right
3x=8
x=8/3
x=2+2/3
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