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10.39+12.9y=17.5-5y
We move all terms to the left:
10.39+12.9y-(17.5-5y)=0
We add all the numbers together, and all the variables
12.9y-(-5y+17.5)+10.39=0
We get rid of parentheses
12.9y+5y-17.5+10.39=0
We add all the numbers together, and all the variables
17.9y-7.11=0
We move all terms containing y to the left, all other terms to the right
17.9y=7.11
y=7.11/17.9
y=6.40540540541/16.1261261261
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