(5v-4)(7-v)=0

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Solution for (5v-4)(7-v)=0 equation:


Simplifying
(5v + -4)(7 + -1v) = 0

Reorder the terms:
(-4 + 5v)(7 + -1v) = 0

Multiply (-4 + 5v) * (7 + -1v)
(-4(7 + -1v) + 5v * (7 + -1v)) = 0
((7 * -4 + -1v * -4) + 5v * (7 + -1v)) = 0
((-28 + 4v) + 5v * (7 + -1v)) = 0
(-28 + 4v + (7 * 5v + -1v * 5v)) = 0
(-28 + 4v + (35v + -5v2)) = 0

Combine like terms: 4v + 35v = 39v
(-28 + 39v + -5v2) = 0

Solving
-28 + 39v + -5v2 = 0

Solving for variable 'v'.

Factor a trinomial.
(-7 + v)(4 + -5v) = 0

Subproblem 1

Set the factor '(-7 + v)' equal to zero and attempt to solve: Simplifying -7 + v = 0 Solving -7 + v = 0 Move all terms containing v to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + v = 0 + 7 Combine like terms: -7 + 7 = 0 0 + v = 0 + 7 v = 0 + 7 Combine like terms: 0 + 7 = 7 v = 7 Simplifying v = 7

Subproblem 2

Set the factor '(4 + -5v)' equal to zero and attempt to solve: Simplifying 4 + -5v = 0 Solving 4 + -5v = 0 Move all terms containing v to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -5v = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -5v = 0 + -4 -5v = 0 + -4 Combine like terms: 0 + -4 = -4 -5v = -4 Divide each side by '-5'. v = 0.8 Simplifying v = 0.8

Solution

v = {7, 0.8}

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