21y+18=-3

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Solution for 21y+18=-3 equation: 



21y+18=-3

We move all terms to the left:

21y+18-(-3)=0

We add all the numbers together, and all the variables

21y+21=0

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

21y=-21

y=-21/21

y=-1

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