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12.42=0.03y
We move all terms to the left:
12.42-(0.03y)=0
We add all the numbers together, and all the variables
-(+0.03y)+12.42=0
We get rid of parentheses
-0.03y+12.42=0
We move all terms containing y to the left, all other terms to the right
-0.03y=-12.42
y=-12.42/-0.03
y=+414
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