2(y^2+9)=(y+12)(2y+3)

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Solution for 2(y^2+9)=(y+12)(2y+3) equation:


Simplifying
2(y2 + 9) = (y + 12)(2y + 3)

Reorder the terms:
2(9 + y2) = (y + 12)(2y + 3)
(9 * 2 + y2 * 2) = (y + 12)(2y + 3)
(18 + 2y2) = (y + 12)(2y + 3)

Reorder the terms:
18 + 2y2 = (12 + y)(2y + 3)

Reorder the terms:
18 + 2y2 = (12 + y)(3 + 2y)

Multiply (12 + y) * (3 + 2y)
18 + 2y2 = (12(3 + 2y) + y(3 + 2y))
18 + 2y2 = ((3 * 12 + 2y * 12) + y(3 + 2y))
18 + 2y2 = ((36 + 24y) + y(3 + 2y))
18 + 2y2 = (36 + 24y + (3 * y + 2y * y))
18 + 2y2 = (36 + 24y + (3y + 2y2))

Combine like terms: 24y + 3y = 27y
18 + 2y2 = (36 + 27y + 2y2)

Add '-2y2' to each side of the equation.
18 + 2y2 + -2y2 = 36 + 27y + 2y2 + -2y2

Combine like terms: 2y2 + -2y2 = 0
18 + 0 = 36 + 27y + 2y2 + -2y2
18 = 36 + 27y + 2y2 + -2y2

Combine like terms: 2y2 + -2y2 = 0
18 = 36 + 27y + 0
18 = 36 + 27y

Solving
18 = 36 + 27y

Solving for variable 'y'.

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

Add '-27y' to each side of the equation.
18 + -27y = 36 + 27y + -27y

Combine like terms: 27y + -27y = 0
18 + -27y = 36 + 0
18 + -27y = 36

Add '-18' to each side of the equation.
18 + -18 + -27y = 36 + -18

Combine like terms: 18 + -18 = 0
0 + -27y = 36 + -18
-27y = 36 + -18

Combine like terms: 36 + -18 = 18
-27y = 18

Divide each side by '-27'.
y = -0.6666666667

Simplifying
y = -0.6666666667

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