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16.8+3y=6y+9
We move all terms to the left:
16.8+3y-(6y+9)=0
We get rid of parentheses
3y-6y-9+16.8=0
We add all the numbers together, and all the variables
-3y+7.8=0
We move all terms containing y to the left, all other terms to the right
-3y=-7.8
y=-7.8/-3
y=2+1/1.66666666667
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