(5y+7)(8+y)=0

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Solution for (5y+7)(8+y)=0 equation: 


Simplifying
(5y + 7)(8 + y) = 0

Reorder the terms:
(7 + 5y)(8 + y) = 0

Multiply (7 + 5y) * (8 + y)
(7(8 + y) + 5y * (8 + y)) = 0
((8 * 7 + y * 7) + 5y * (8 + y)) = 0
((56 + 7y) + 5y * (8 + y)) = 0
(56 + 7y + (8 * 5y + y * 5y)) = 0
(56 + 7y + (40y + 5y2)) = 0

Combine like terms: 7y + 40y = 47y
(56 + 47y + 5y2) = 0

Solving
56 + 47y + 5y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(8 + y)(7 + 5y) = 0


Subproblem 1
Set the factor '(8 + y)' equal to zero and attempt to solve:

Simplifying
8 + y = 0

Solving
8 + y = 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 + y = 0 + -8

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

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

Simplifying
y = -8

Subproblem 2
Set the factor '(7 + 5y)' equal to zero and attempt to solve:

Simplifying
7 + 5y = 0

Solving
7 + 5y = 0

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

Add '-7' to each side of the equation.
7 + -7 + 5y = 0 + -7

Combine like terms: 7 + -7 = 0
0 + 5y = 0 + -7
5y = 0 + -7

Combine like terms: 0 + -7 = -7
5y = -7

Divide each side by '5'.
y = -1.4

Simplifying
y = -1.4
Solution
y = {-8, -1.4}

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