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

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


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

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

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

Combine like terms: -4v + 35v = 31v
(-28 + 31v + 5v2) = 0

Solving
-28 + 31v + 5v2 = 0

Solving for variable 'v'.

Factor a trinomial.
(-7 + -1v)(4 + -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 '(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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