3(-5)-y=21

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Solution for 3(-5)-y=21 equation: 



3(-5)-y=21

We move all terms to the left:

3(-5)-y-(21)=0

determiningTheFunctionDomain
-y-21+3(-5)=0

We add all the numbers together, and all the variables

-1y-36=0

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

-y=36

y=36/-1

y=-36

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