21-6y+y=6

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Solution for 21-6y+y=6 equation: 



21-6y+y=6

We move all terms to the left:

21-6y+y-(6)=0

We add all the numbers together, and all the variables

-5y+15=0

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

-5y=-15

y=-15/-5

y=+3

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