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13=2x-5+6
We move all terms to the left:
13-(2x-5+6)=0
We add all the numbers together, and all the variables
-(2x+1)+13=0
We get rid of parentheses
-2x-1+13=0
We add all the numbers together, and all the variables
-2x+12=0
We move all terms containing x to the left, all other terms to the right
-2x=-12
x=-12/-2
x=+6
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