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20.5=0.3x-2
We move all terms to the left:
20.5-(0.3x-2)=0
We get rid of parentheses
-0.3x+2+20.5=0
We add all the numbers together, and all the variables
-0.3x+22.5=0
We move all terms containing x to the left, all other terms to the right
-0.3x=-22.5
x=-22.5/-0.3
x=+75
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