(3z-1)(7-z)=0

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Solution for (3z-1)(7-z)=0 equation:


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

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

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

Combine like terms: 1z + 21z = 22z
(-7 + 22z + -3z2) = 0

Solving
-7 + 22z + -3z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(-7 + z)(1 + -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 '(1 + -3z)' equal to zero and attempt to solve: Simplifying 1 + -3z = 0 Solving 1 + -3z = 0 Move all terms containing z to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -3z = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -3z = 0 + -1 -3z = 0 + -1 Combine like terms: 0 + -1 = -1 -3z = -1 Divide each side by '-3'. z = 0.3333333333 Simplifying z = 0.3333333333

Solution

z = {7, 0.3333333333}

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