(7-z)(4z-3)=0

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Solution for (7-z)(4z-3)=0 equation:


Simplifying
(7 + -1z)(4z + -3) = 0

Reorder the terms:
(7 + -1z)(-3 + 4z) = 0

Multiply (7 + -1z) * (-3 + 4z)
(7(-3 + 4z) + -1z * (-3 + 4z)) = 0
((-3 * 7 + 4z * 7) + -1z * (-3 + 4z)) = 0
((-21 + 28z) + -1z * (-3 + 4z)) = 0
(-21 + 28z + (-3 * -1z + 4z * -1z)) = 0
(-21 + 28z + (3z + -4z2)) = 0

Combine like terms: 28z + 3z = 31z
(-21 + 31z + -4z2) = 0

Solving
-21 + 31z + -4z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(-7 + z)(3 + -4z) = 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 '(3 + -4z)' equal to zero and attempt to solve: Simplifying 3 + -4z = 0 Solving 3 + -4z = 0 Move all terms containing z to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -4z = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -4z = 0 + -3 -4z = 0 + -3 Combine like terms: 0 + -3 = -3 -4z = -3 Divide each side by '-4'. z = 0.75 Simplifying z = 0.75

Solution

z = {7, 0.75}

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