(y+12)(y-3)-y(y+5)=24

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Solution for (y+12)(y-3)-y(y+5)=24 equation:


Simplifying
(y + 12)(y + -3) + -1y(y + 5) = 24

Reorder the terms:
(12 + y)(y + -3) + -1y(y + 5) = 24

Reorder the terms:
(12 + y)(-3 + y) + -1y(y + 5) = 24

Multiply (12 + y) * (-3 + y)
(12(-3 + y) + y(-3 + y)) + -1y(y + 5) = 24
((-3 * 12 + y * 12) + y(-3 + y)) + -1y(y + 5) = 24
((-36 + 12y) + y(-3 + y)) + -1y(y + 5) = 24
(-36 + 12y + (-3 * y + y * y)) + -1y(y + 5) = 24
(-36 + 12y + (-3y + y2)) + -1y(y + 5) = 24

Combine like terms: 12y + -3y = 9y
(-36 + 9y + y2) + -1y(y + 5) = 24

Reorder the terms:
-36 + 9y + y2 + -1y(5 + y) = 24
-36 + 9y + y2 + (5 * -1y + y * -1y) = 24
-36 + 9y + y2 + (-5y + -1y2) = 24

Reorder the terms:
-36 + 9y + -5y + y2 + -1y2 = 24

Combine like terms: 9y + -5y = 4y
-36 + 4y + y2 + -1y2 = 24

Combine like terms: y2 + -1y2 = 0
-36 + 4y + 0 = 24
-36 + 4y = 24

Solving
-36 + 4y = 24

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '36' to each side of the equation.
-36 + 36 + 4y = 24 + 36

Combine like terms: -36 + 36 = 0
0 + 4y = 24 + 36
4y = 24 + 36

Combine like terms: 24 + 36 = 60
4y = 60

Divide each side by '4'.
y = 15

Simplifying
y = 15

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