4=9-7y

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Solution for 4=9-7y equation: 



4=9-7y

We move all terms to the left:

4-(9-7y)=0

We add all the numbers together, and all the variables

-(-7y+9)+4=0

We get rid of parentheses

7y-9+4=0

We add all the numbers together, and all the variables

7y-5=0

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

7y=5

y=5/7

y=5/7

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