3y-9=90

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Solution for 3y-9=90 equation: 



3y-9=90

We move all terms to the left:

3y-9-(90)=0

We add all the numbers together, and all the variables

3y-99=0

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

3y=99

y=99/3

y=33

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