(7)-2y=9

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Solution for (7)-2y=9 equation: 



(7)-2y=9

We move all terms to the left:

(7)-2y-(9)=0

We add all the numbers together, and all the variables

-2y-2=0

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

-2y=2

y=2/-2

y=-1

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