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3.6y+5.4=19.8
We move all terms to the left:
3.6y+5.4-(19.8)=0
We add all the numbers together, and all the variables
3.6y-14.4=0
We move all terms containing y to the left, all other terms to the right
3.6y=14.4
y=14.4/3.6
y=4
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