Y=7a-21+4

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Solution for Y=7a-21+4 equation: 



=7Y-21+4

We move all terms to the left:

-(7Y-21+4)=0

We add all the numbers together, and all the variables

-(7Y-17)=0

We get rid of parentheses

-7Y+17=0

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

-7Y=-17

Y=-17/-7

Y=2+3/7

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