4-12y+8y-21=-5

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Solution for 4-12y+8y-21=-5 equation: 



4-12y+8y-21=-5

We move all terms to the left:

4-12y+8y-21-(-5)=0

We add all the numbers together, and all the variables

-4y-12=0

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

-4y=12

y=12/-4

y=-3

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