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(0.2x+20.2=31)
We move all terms to the left:
(0.2x+20.2-(31))=0
We add all the numbers together, and all the variables
(0.2x-10.8)=0
We get rid of parentheses
0.2x-10.8=0
We move all terms containing x to the left, all other terms to the right
0.2x=10.8
x=10.8/0.2
x=54
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