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=12-3.75Y
We move all terms to the left:
-(12-3.75Y)=0
We add all the numbers together, and all the variables
-(-3.75Y+12)=0
We get rid of parentheses
3.75Y-12=0
We move all terms containing Y to the left, all other terms to the right
3.75Y=12
Y=12/3.75
Y=3+0.75/3.75
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