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

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


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

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

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

Multiply (4 + 3x) * (-4 + x)
(4(-4 + x) + 3x * (-4 + x)) = (3x + -7)(x + -4)
((-4 * 4 + x * 4) + 3x * (-4 + x)) = (3x + -7)(x + -4)
((-16 + 4x) + 3x * (-4 + x)) = (3x + -7)(x + -4)
(-16 + 4x + (-4 * 3x + x * 3x)) = (3x + -7)(x + -4)
(-16 + 4x + (-12x + 3x2)) = (3x + -7)(x + -4)

Combine like terms: 4x + -12x = -8x
(-16 + -8x + 3x2) = (3x + -7)(x + -4)

Reorder the terms:
-16 + -8x + 3x2 = (-7 + 3x)(x + -4)

Reorder the terms:
-16 + -8x + 3x2 = (-7 + 3x)(-4 + x)

Multiply (-7 + 3x) * (-4 + x)
-16 + -8x + 3x2 = (-7(-4 + x) + 3x * (-4 + x))
-16 + -8x + 3x2 = ((-4 * -7 + x * -7) + 3x * (-4 + x))
-16 + -8x + 3x2 = ((28 + -7x) + 3x * (-4 + x))
-16 + -8x + 3x2 = (28 + -7x + (-4 * 3x + x * 3x))
-16 + -8x + 3x2 = (28 + -7x + (-12x + 3x2))

Combine like terms: -7x + -12x = -19x
-16 + -8x + 3x2 = (28 + -19x + 3x2)

Add '-3x2' to each side of the equation.
-16 + -8x + 3x2 + -3x2 = 28 + -19x + 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-16 + -8x + 0 = 28 + -19x + 3x2 + -3x2
-16 + -8x = 28 + -19x + 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-16 + -8x = 28 + -19x + 0
-16 + -8x = 28 + -19x

Solving
-16 + -8x = 28 + -19x

Solving for variable 'x'.

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

Add '19x' to each side of the equation.
-16 + -8x + 19x = 28 + -19x + 19x

Combine like terms: -8x + 19x = 11x
-16 + 11x = 28 + -19x + 19x

Combine like terms: -19x + 19x = 0
-16 + 11x = 28 + 0
-16 + 11x = 28

Add '16' to each side of the equation.
-16 + 16 + 11x = 28 + 16

Combine like terms: -16 + 16 = 0
0 + 11x = 28 + 16
11x = 28 + 16

Combine like terms: 28 + 16 = 44
11x = 44

Divide each side by '11'.
x = 4

Simplifying
x = 4

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