(Y-7)(y+7)=4y

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Solution for (Y-7)(y+7)=4y equation: 



(-7)(Y+7)=4Y

We move all terms to the left:

(-7)(Y+7)-(4Y)=0

We add all the numbers together, and all the variables

-4Y+(-7)(Y+7)=0

We multiply parentheses ..

-4Y+(-7Y-49)=0

We get rid of parentheses

-4Y-7Y-49=0

We add all the numbers together, and all the variables

-11Y-49=0

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

-11Y=49

Y=49/-11

Y=-4+5/11

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