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20-2x=8+4x
We move all terms to the left:
20-2x-(8+4x)=0
We add all the numbers together, and all the variables
-2x-(4x+8)+20=0
We get rid of parentheses
-2x-4x-8+20=0
We add all the numbers together, and all the variables
-6x+12=0
We move all terms containing x to the left, all other terms to the right
-6x=-12
x=-12/-6
x=+2
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