90y-3=10y-21

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Solution for 90y-3=10y-21 equation: 



90y-3=10y-21

We move all terms to the left:

90y-3-(10y-21)=0

We get rid of parentheses

90y-10y+21-3=0

We add all the numbers together, and all the variables

80y+18=0

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

80y=-18

y=-18/80

y=-9/40

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