-7y-21=7y+77

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Solution for -7y-21=7y+77 equation: 



-7y-21=7y+77

We move all terms to the left:

-7y-21-(7y+77)=0

We get rid of parentheses

-7y-7y-77-21=0

We add all the numbers together, and all the variables

-14y-98=0

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

-14y=98

y=98/-14

y=-7

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