15-4=-21-y

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Solution for 15-4=-21-y equation: 



15-4=-21-y

We move all terms to the left:

15-4-(-21-y)=0

We add all the numbers together, and all the variables

-(-1y-21)+15-4=0

We add all the numbers together, and all the variables

-(-1y-21)+11=0

We get rid of parentheses

1y+21+11=0

We add all the numbers together, and all the variables

y+32=0

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

y=-32

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