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13=8x+6x
We move all terms to the left:
13-(8x+6x)=0
We add all the numbers together, and all the variables
-(+14x)+13=0
We get rid of parentheses
-14x+13=0
We move all terms containing x to the left, all other terms to the right
-14x=-13
x=-13/-14
x=13/14
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