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3.50+2.50y=16
We move all terms to the left:
3.50+2.50y-(16)=0
We add all the numbers together, and all the variables
2.50y-12.5=0
We move all terms containing y to the left, all other terms to the right
2.50y=12.5
y=12.5/2.50
y=5
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