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1-2.3y=9.9
We move all terms to the left:
1-2.3y-(9.9)=0
We add all the numbers together, and all the variables
-2.3y-8.9=0
We move all terms containing y to the left, all other terms to the right
-2.3y=8.9
y=8.9/-2.3
y=-3+1/1.15
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