9y-16y=-21-28

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Solution for 9y-16y=-21-28 equation: 



9y-16y=-21-28

We move all terms to the left:

9y-16y-(-21-28)=0

We add all the numbers together, and all the variables

9y-16y-(-49)=0

We add all the numbers together, and all the variables

-7y+49=0

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

-7y=-49

y=-49/-7

y=+7

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