(5v+3)(7-v)=0

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Solution for (5v+3)(7-v)=0 equation:


Simplifying
(5v + 3)(7 + -1v) = 0

Reorder the terms:
(3 + 5v)(7 + -1v) = 0

Multiply (3 + 5v) * (7 + -1v)
(3(7 + -1v) + 5v * (7 + -1v)) = 0
((7 * 3 + -1v * 3) + 5v * (7 + -1v)) = 0
((21 + -3v) + 5v * (7 + -1v)) = 0
(21 + -3v + (7 * 5v + -1v * 5v)) = 0
(21 + -3v + (35v + -5v2)) = 0

Combine like terms: -3v + 35v = 32v
(21 + 32v + -5v2) = 0

Solving
21 + 32v + -5v2 = 0

Solving for variable 'v'.

Factor a trinomial.
(7 + -1v)(3 + 5v) = 0

Subproblem 1

Set the factor '(7 + -1v)' equal to zero and attempt to solve: Simplifying 7 + -1v = 0 Solving 7 + -1v = 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 + -1v = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1v = 0 + -7 -1v = 0 + -7 Combine like terms: 0 + -7 = -7 -1v = -7 Divide each side by '-1'. v = 7 Simplifying v = 7

Subproblem 2

Set the factor '(3 + 5v)' equal to zero and attempt to solve: Simplifying 3 + 5v = 0 Solving 3 + 5v = 0 Move all terms containing v to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 5v = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 5v = 0 + -3 5v = 0 + -3 Combine like terms: 0 + -3 = -3 5v = -3 Divide each side by '5'. v = -0.6 Simplifying v = -0.6

Solution

v = {7, -0.6}

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