(6-z)(4z-5)=0

Solution for (6-z)(4z-5)=0 equation:

Simplifying
(6 + -1z)(4z + -5) = 0

Reorder the terms:
(6 + -1z)(-5 + 4z) = 0

Multiply (6 + -1z) * (-5 + 4z)
(6(-5 + 4z) + -1z * (-5 + 4z)) = 0
((-5 * 6 + 4z * 6) + -1z * (-5 + 4z)) = 0
((-30 + 24z) + -1z * (-5 + 4z)) = 0
(-30 + 24z + (-5 * -1z + 4z * -1z)) = 0
(-30 + 24z + (5z + -4z2)) = 0

Combine like terms: 24z + 5z = 29z
(-30 + 29z + -4z2) = 0

Solving
-30 + 29z + -4z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(-6 + z)(5 + -4z) = 0

Subproblem 1
Set the factor '(-6 + z)' equal to zero and attempt to solve:

Simplifying
-6 + z = 0

Solving
-6 + z = 0

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

Add '6' to each side of the equation.
-6 + 6 + z = 0 + 6

Combine like terms: -6 + 6 = 0
0 + z = 0 + 6
z = 0 + 6

Combine like terms: 0 + 6 = 6
z = 6

Simplifying
z = 6
Subproblem 2
Set the factor '(5 + -4z)' equal to zero and attempt to solve:

Simplifying
5 + -4z = 0

Solving
5 + -4z = 0

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

Add '-5' to each side of the equation.
5 + -5 + -4z = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -4z = 0 + -5
-4z = 0 + -5

Combine like terms: 0 + -5 = -5
-4z = -5

Divide each side by '-4'.
z = 1.25

Simplifying
z = 1.25
Solution
z = {6, 1.25}