Y=90-7x-12

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Solution for Y=90-7x-12 equation: 



=90-7Y-12

We move all terms to the left:

-(90-7Y-12)=0

We add all the numbers together, and all the variables

-(-7Y+78)=0

We get rid of parentheses

7Y-78=0

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

7Y=78

Y=78/7

Y=11+1/7

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