(x+7)(4x-3)=0

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


Simplifying
(x + 7)(4x + -3) = 0

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

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

Multiply (7 + x) * (-3 + 4x)
(7(-3 + 4x) + x(-3 + 4x)) = 0
((-3 * 7 + 4x * 7) + x(-3 + 4x)) = 0
((-21 + 28x) + x(-3 + 4x)) = 0
(-21 + 28x + (-3 * x + 4x * x)) = 0
(-21 + 28x + (-3x + 4x2)) = 0

Combine like terms: 28x + -3x = 25x
(-21 + 25x + 4x2) = 0

Solving
-21 + 25x + 4x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-7 + -1x)(3 + -4x) = 0


Subproblem 1
Set the factor '(-7 + -1x)' equal to zero and attempt to solve:

Simplifying
-7 + -1x = 0

Solving
-7 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '7' to each side of the equation.
-7 + 7 + -1x = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -1x = 0 + 7
-1x = 0 + 7

Combine like terms: 0 + 7 = 7
-1x = 7

Divide each side by '-1'.
x = -7

Simplifying
x = -7

Subproblem 2
Set the factor '(3 + -4x)' equal to zero and attempt to solve:

Simplifying
3 + -4x = 0

Solving
3 + -4x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-3' to each side of the equation.
3 + -3 + -4x = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -4x = 0 + -3
-4x = 0 + -3

Combine like terms: 0 + -3 = -3
-4x = -3

Divide each side by '-4'.
x = 0.75

Simplifying
x = 0.75
Solution
x = {-7, 0.75}

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