6y+(-21)=9

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Solution for 6y+(-21)=9 equation: 



6y+(-21)=9

We move all terms to the left:

6y+(-21)-(9)=0

determiningTheFunctionDomain
6y-9+(-21)=0

We add all the numbers together, and all the variables

6y-30=0

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

6y=30

y=30/6

y=5

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