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20-0.5x=-4+x
We move all terms to the left:
20-0.5x-(-4+x)=0
We add all the numbers together, and all the variables
-0.5x-(x-4)+20=0
We get rid of parentheses
-0.5x-x+4+20=0
We add all the numbers together, and all the variables
-1.5x+24=0
We move all terms containing x to the left, all other terms to the right
-1.5x=-24
x=-24/-1.5
x=+16
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