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-13.9+11.8y=12.8y
We move all terms to the left:
-13.9+11.8y-(12.8y)=0
We add all the numbers together, and all the variables
11.8y-(+12.8y)-13.9=0
We get rid of parentheses
11.8y-12.8y-13.9=0
We add all the numbers together, and all the variables
-1y-13.9=0
We move all terms containing y to the left, all other terms to the right
-y=13.9
y=13.9/-1
y=-13+0.9/1
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