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

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


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

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

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

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

Combine like terms: 7x + -3x = 4x
(-21 + 4x + x2) = (2x + 5)(x + -3)

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

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

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

Combine like terms: 5x + -6x = -1x
-21 + 4x + x2 = (-15 + -1x + 2x2)

Solving
-21 + 4x + x2 = -15 + -1x + 2x2

Solving for variable 'x'.

Reorder the terms:
-21 + 15 + 4x + x + x2 + -2x2 = -15 + -1x + 2x2 + 15 + x + -2x2

Combine like terms: -21 + 15 = -6
-6 + 4x + x + x2 + -2x2 = -15 + -1x + 2x2 + 15 + x + -2x2

Combine like terms: 4x + x = 5x
-6 + 5x + x2 + -2x2 = -15 + -1x + 2x2 + 15 + x + -2x2

Combine like terms: x2 + -2x2 = -1x2
-6 + 5x + -1x2 = -15 + -1x + 2x2 + 15 + x + -2x2

Reorder the terms:
-6 + 5x + -1x2 = -15 + 15 + -1x + x + 2x2 + -2x2

Combine like terms: -15 + 15 = 0
-6 + 5x + -1x2 = 0 + -1x + x + 2x2 + -2x2
-6 + 5x + -1x2 = -1x + x + 2x2 + -2x2

Combine like terms: -1x + x = 0
-6 + 5x + -1x2 = 0 + 2x2 + -2x2
-6 + 5x + -1x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-6 + 5x + -1x2 = 0

Factor a trinomial.
(-3 + x)(2 + -1x) = 0

Subproblem 1

Set the factor '(-3 + x)' equal to zero and attempt to solve: Simplifying -3 + x = 0 Solving -3 + x = 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 + x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + x = 0 + 3 x = 0 + 3 Combine like terms: 0 + 3 = 3 x = 3 Simplifying x = 3

Subproblem 2

Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2

Solution

x = {3, 2}

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