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2.5y+y=2.798
We move all terms to the left:
2.5y+y-(2.798)=0
We add all the numbers together, and all the variables
3.5y-2.798=0
We move all terms containing y to the left, all other terms to the right
3.5y=2.798
y=2.798/3.5
y=2.798/3.5
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