21+4y=-3

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Solution for 21+4y=-3 equation: 



21+4y=-3

We move all terms to the left:

21+4y-(-3)=0

We add all the numbers together, and all the variables

4y+24=0

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

4y=-24

y=-24/4

y=-6

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