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3y+y=1.30
We move all terms to the left:
3y+y-(1.30)=0
We add all the numbers together, and all the variables
3y+y-(1.3)=0
We add all the numbers together, and all the variables
4y-1.3=0
We move all terms containing y to the left, all other terms to the right
4y=1.3
y=1.3/4
y=1/3.0769230769231
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