7y-63=-21

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Solution for 7y-63=-21 equation: 



7y-63=-21

We move all terms to the left:

7y-63-(-21)=0

We add all the numbers together, and all the variables

7y-42=0

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

7y=42

y=42/7

y=6

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