-y=4-9y

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Solution for -y=4-9y equation: 



-y=4-9y

We move all terms to the left:

-y-(4-9y)=0

We add all the numbers together, and all the variables

-y-(-9y+4)=0

We add all the numbers together, and all the variables

-1y-(-9y+4)=0

We get rid of parentheses

-1y+9y-4=0

We add all the numbers together, and all the variables

8y-4=0

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

8y=4

y=4/8

y=1/2

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