21(2-y)+12y=51

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Solution for 21(2-y)+12y=51 equation: 



21(2-y)+12y=51

We move all terms to the left:

21(2-y)+12y-(51)=0

We add all the numbers together, and all the variables

21(-1y+2)+12y-51=0

We add all the numbers together, and all the variables

12y+21(-1y+2)-51=0

We multiply parentheses

12y-21y+42-51=0

We add all the numbers together, and all the variables

-9y-9=0

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

-9y=9

y=9/-9

y=-1

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