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20=2x-8x
We move all terms to the left:
20-(2x-8x)=0
We add all the numbers together, and all the variables
-(-6x)+20=0
We get rid of parentheses
6x+20=0
We move all terms containing x to the left, all other terms to the right
6x=-20
x=-20/6
x=-3+1/3
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