15+6y=-21

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Solution for 15+6y=-21 equation: 



15+6y=-21

We move all terms to the left:

15+6y-(-21)=0

We add all the numbers together, and all the variables

6y+36=0

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

6y=-36

y=-36/6

y=-6

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