3y+20-y=90

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Solution for 3y+20-y=90 equation: 



3y+20-y=90

We move all terms to the left:

3y+20-y-(90)=0

We add all the numbers together, and all the variables

2y-70=0

We move all terms containing y to the left, all other terms to the right

2y=70

y=70/2

y=35

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