(5y-8)(9-y)=0

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Solution for (5y-8)(9-y)=0 equation: 


Simplifying
(5y + -8)(9 + -1y) = 0

Reorder the terms:
(-8 + 5y)(9 + -1y) = 0

Multiply (-8 + 5y) * (9 + -1y)
(-8(9 + -1y) + 5y * (9 + -1y)) = 0
((9 * -8 + -1y * -8) + 5y * (9 + -1y)) = 0
((-72 + 8y) + 5y * (9 + -1y)) = 0
(-72 + 8y + (9 * 5y + -1y * 5y)) = 0
(-72 + 8y + (45y + -5y2)) = 0

Combine like terms: 8y + 45y = 53y
(-72 + 53y + -5y2) = 0

Solving
-72 + 53y + -5y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(-9 + y)(8 + -5y) = 0


Subproblem 1
Set the factor '(-9 + y)' equal to zero and attempt to solve:

Simplifying
-9 + y = 0

Solving
-9 + y = 0

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

Add '9' to each side of the equation.
-9 + 9 + y = 0 + 9

Combine like terms: -9 + 9 = 0
0 + y = 0 + 9
y = 0 + 9

Combine like terms: 0 + 9 = 9
y = 9

Simplifying
y = 9

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 = {9, 1.6}

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