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20=13x-8
We move all terms to the left:
20-(13x-8)=0
We get rid of parentheses
-13x+8+20=0
We add all the numbers together, and all the variables
-13x+28=0
We move all terms containing x to the left, all other terms to the right
-13x=-28
x=-28/-13
x=2+2/13
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