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3.5+5y=80
We move all terms to the left:
3.5+5y-(80)=0
We add all the numbers together, and all the variables
5y-76.5=0
We move all terms containing y to the left, all other terms to the right
5y=76.5
y=76.5/5
y=15+1/3.3333333333333
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