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20-0.5x=20+0.5x
We move all terms to the left:
20-0.5x-(20+0.5x)=0
We add all the numbers together, and all the variables
-0.5x-(0.5x+20)+20=0
We get rid of parentheses
-0.5x-0.5x-20+20=0
We add all the numbers together, and all the variables
-x=0
x=0/-1
x=0
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