(x+7)(4x-3)=(2x+5)(2x+3)

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Solution for (x+7)(4x-3)=(2x+5)(2x+3) equation:


Simplifying
(x + 7)(4x + -3) = (2x + 5)(2x + 3)

Reorder the terms:
(7 + x)(4x + -3) = (2x + 5)(2x + 3)

Reorder the terms:
(7 + x)(-3 + 4x) = (2x + 5)(2x + 3)

Multiply (7 + x) * (-3 + 4x)
(7(-3 + 4x) + x(-3 + 4x)) = (2x + 5)(2x + 3)
((-3 * 7 + 4x * 7) + x(-3 + 4x)) = (2x + 5)(2x + 3)
((-21 + 28x) + x(-3 + 4x)) = (2x + 5)(2x + 3)
(-21 + 28x + (-3 * x + 4x * x)) = (2x + 5)(2x + 3)
(-21 + 28x + (-3x + 4x2)) = (2x + 5)(2x + 3)

Combine like terms: 28x + -3x = 25x
(-21 + 25x + 4x2) = (2x + 5)(2x + 3)

Reorder the terms:
-21 + 25x + 4x2 = (5 + 2x)(2x + 3)

Reorder the terms:
-21 + 25x + 4x2 = (5 + 2x)(3 + 2x)

Multiply (5 + 2x) * (3 + 2x)
-21 + 25x + 4x2 = (5(3 + 2x) + 2x * (3 + 2x))
-21 + 25x + 4x2 = ((3 * 5 + 2x * 5) + 2x * (3 + 2x))
-21 + 25x + 4x2 = ((15 + 10x) + 2x * (3 + 2x))
-21 + 25x + 4x2 = (15 + 10x + (3 * 2x + 2x * 2x))
-21 + 25x + 4x2 = (15 + 10x + (6x + 4x2))

Combine like terms: 10x + 6x = 16x
-21 + 25x + 4x2 = (15 + 16x + 4x2)

Add '-4x2' to each side of the equation.
-21 + 25x + 4x2 + -4x2 = 15 + 16x + 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-21 + 25x + 0 = 15 + 16x + 4x2 + -4x2
-21 + 25x = 15 + 16x + 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-21 + 25x = 15 + 16x + 0
-21 + 25x = 15 + 16x

Solving
-21 + 25x = 15 + 16x

Solving for variable 'x'.

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

Add '-16x' to each side of the equation.
-21 + 25x + -16x = 15 + 16x + -16x

Combine like terms: 25x + -16x = 9x
-21 + 9x = 15 + 16x + -16x

Combine like terms: 16x + -16x = 0
-21 + 9x = 15 + 0
-21 + 9x = 15

Add '21' to each side of the equation.
-21 + 21 + 9x = 15 + 21

Combine like terms: -21 + 21 = 0
0 + 9x = 15 + 21
9x = 15 + 21

Combine like terms: 15 + 21 = 36
9x = 36

Divide each side by '9'.
x = 4

Simplifying
x = 4

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