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5+(2+x)=13
We move all terms to the left:
5+(2+x)-(13)=0
We add all the numbers together, and all the variables
(x+2)+5-13=0
We add all the numbers together, and all the variables
(x+2)-8=0
We get rid of parentheses
x+2-8=0
We add all the numbers together, and all the variables
x-6=0
We move all terms containing x to the left, all other terms to the right
x=6
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