-3y-6=-21

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Solution for -3y-6=-21 equation: 



-3y-6=-21

We move all terms to the left:

-3y-6-(-21)=0

We add all the numbers together, and all the variables

-3y+15=0

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

-3y=-15

y=-15/-3

y=+5

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