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20=1.5x+2
We move all terms to the left:
20-(1.5x+2)=0
We get rid of parentheses
-1.5x-2+20=0
We add all the numbers together, and all the variables
-1.5x+18=0
We move all terms containing x to the left, all other terms to the right
-1.5x=-18
x=-18/-1.5
x=+12
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