(7-z)(3z-8)=0

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Solution for (7-z)(3z-8)=0 equation: 


Simplifying
(7 + -1z)(3z + -8) = 0

Reorder the terms:
(7 + -1z)(-8 + 3z) = 0

Multiply (7 + -1z) * (-8 + 3z)
(7(-8 + 3z) + -1z * (-8 + 3z)) = 0
((-8 * 7 + 3z * 7) + -1z * (-8 + 3z)) = 0
((-56 + 21z) + -1z * (-8 + 3z)) = 0
(-56 + 21z + (-8 * -1z + 3z * -1z)) = 0
(-56 + 21z + (8z + -3z2)) = 0

Combine like terms: 21z + 8z = 29z
(-56 + 29z + -3z2) = 0

Solving
-56 + 29z + -3z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(-7 + z)(8 + -3z) = 0


Subproblem 1
Set the factor '(-7 + z)' equal to zero and attempt to solve:

Simplifying
-7 + z = 0

Solving
-7 + z = 0

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

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

Combine like terms: -7 + 7 = 0
0 + z = 0 + 7
z = 0 + 7

Combine like terms: 0 + 7 = 7
z = 7

Simplifying
z = 7

Subproblem 2
Set the factor '(8 + -3z)' equal to zero and attempt to solve:

Simplifying
8 + -3z = 0

Solving
8 + -3z = 0

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

Add '-8' to each side of the equation.
8 + -8 + -3z = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -3z = 0 + -8
-3z = 0 + -8

Combine like terms: 0 + -8 = -8
-3z = -8

Divide each side by '-3'.
z = 2.666666667

Simplifying
z = 2.666666667
Solution
z = {7, 2.666666667}

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