Y=90-45x

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Solution for Y=90-45x equation: 



=90-45Y

We move all terms to the left:

-(90-45Y)=0

We add all the numbers together, and all the variables

-(-45Y+90)=0

We get rid of parentheses

45Y-90=0

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

45Y=90

Y=90/45

Y=2

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