(5y+8)(3+y)=0

Solution for (5y+8)(3+y)=0 equation:

Simplifying
(5y + 8)(3 + y) = 0

Reorder the terms:
(8 + 5y)(3 + y) = 0

Multiply (8 + 5y) * (3 + y)
(8(3 + y) + 5y * (3 + y)) = 0
((3 * 8 + y * 8) + 5y * (3 + y)) = 0
((24 + 8y) + 5y * (3 + y)) = 0
(24 + 8y + (3 * 5y + y * 5y)) = 0
(24 + 8y + (15y + 5y2)) = 0

Combine like terms: 8y + 15y = 23y
(24 + 23y + 5y2) = 0

Solving
24 + 23y + 5y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(3 + y)(8 + 5y) = 0

Subproblem 1
Set the factor '(3 + y)' equal to zero and attempt to solve:

Simplifying
3 + y = 0

Solving
3 + y = 0

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

Add '-3' to each side of the equation.
3 + -3 + y = 0 + -3

Combine like terms: 3 + -3 = 0
0 + y = 0 + -3
y = 0 + -3

Combine like terms: 0 + -3 = -3
y = -3

Simplifying
y = -3
Subproblem 2
Set the factor '(8 + 5y)' equal to zero and attempt to solve:

Simplifying
8 + 5y = 0

Solving
8 + 5y = 0

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

Add '-8' to each side of the equation.
8 + -8 + 5y = 0 + -8

Combine like terms: 8 + -8 = 0
0 + 5y = 0 + -8
5y = 0 + -8

Combine like terms: 0 + -8 = -8
5y = -8

Divide each side by '5'.
y = -1.6

Simplifying
y = -1.6
Solution
y = {-3, -1.6}