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20=0.5x-8
We move all terms to the left:
20-(0.5x-8)=0
We get rid of parentheses
-0.5x+8+20=0
We add all the numbers together, and all the variables
-0.5x+28=0
We move all terms containing x to the left, all other terms to the right
-0.5x=-28
x=-28/-0.5
x=+56
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