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20.1=4x-5.5
We move all terms to the left:
20.1-(4x-5.5)=0
We get rid of parentheses
-4x+5.5+20.1=0
We add all the numbers together, and all the variables
-4x+25.6=0
We move all terms containing x to the left, all other terms to the right
-4x=-25.6
x=-25.6/-4
x=6+1/2.5
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