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3.1=-8y+15.9
We move all terms to the left:
3.1-(-8y+15.9)=0
We get rid of parentheses
8y-15.9+3.1=0
We add all the numbers together, and all the variables
8y-12.8=0
We move all terms containing y to the left, all other terms to the right
8y=12.8
y=12.8/8
y=1+1/1.6666666666667
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