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15=2x+3.8
We move all terms to the left:
15-(2x+3.8)=0
We get rid of parentheses
-2x-3.8+15=0
We add all the numbers together, and all the variables
-2x+11.2=0
We move all terms containing x to the left, all other terms to the right
-2x=-11.2
x=-11.2/-2
x=5+1/1.66666666667
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