(x+7)(x+6)+12=(x+5)(x+9)

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Solution for (x+7)(x+6)+12=(x+5)(x+9) equation:


Simplifying
(x + 7)(x + 6) + 12 = (x + 5)(x + 9)

Reorder the terms:
(7 + x)(x + 6) + 12 = (x + 5)(x + 9)

Reorder the terms:
(7 + x)(6 + x) + 12 = (x + 5)(x + 9)

Multiply (7 + x) * (6 + x)
(7(6 + x) + x(6 + x)) + 12 = (x + 5)(x + 9)
((6 * 7 + x * 7) + x(6 + x)) + 12 = (x + 5)(x + 9)
((42 + 7x) + x(6 + x)) + 12 = (x + 5)(x + 9)
(42 + 7x + (6 * x + x * x)) + 12 = (x + 5)(x + 9)
(42 + 7x + (6x + x2)) + 12 = (x + 5)(x + 9)

Combine like terms: 7x + 6x = 13x
(42 + 13x + x2) + 12 = (x + 5)(x + 9)

Reorder the terms:
42 + 12 + 13x + x2 = (x + 5)(x + 9)

Combine like terms: 42 + 12 = 54
54 + 13x + x2 = (x + 5)(x + 9)

Reorder the terms:
54 + 13x + x2 = (5 + x)(x + 9)

Reorder the terms:
54 + 13x + x2 = (5 + x)(9 + x)

Multiply (5 + x) * (9 + x)
54 + 13x + x2 = (5(9 + x) + x(9 + x))
54 + 13x + x2 = ((9 * 5 + x * 5) + x(9 + x))
54 + 13x + x2 = ((45 + 5x) + x(9 + x))
54 + 13x + x2 = (45 + 5x + (9 * x + x * x))
54 + 13x + x2 = (45 + 5x + (9x + x2))

Combine like terms: 5x + 9x = 14x
54 + 13x + x2 = (45 + 14x + x2)

Add '-1x2' to each side of the equation.
54 + 13x + x2 + -1x2 = 45 + 14x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
54 + 13x + 0 = 45 + 14x + x2 + -1x2
54 + 13x = 45 + 14x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
54 + 13x = 45 + 14x + 0
54 + 13x = 45 + 14x

Solving
54 + 13x = 45 + 14x

Solving for variable 'x'.

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

Add '-14x' to each side of the equation.
54 + 13x + -14x = 45 + 14x + -14x

Combine like terms: 13x + -14x = -1x
54 + -1x = 45 + 14x + -14x

Combine like terms: 14x + -14x = 0
54 + -1x = 45 + 0
54 + -1x = 45

Add '-54' to each side of the equation.
54 + -54 + -1x = 45 + -54

Combine like terms: 54 + -54 = 0
0 + -1x = 45 + -54
-1x = 45 + -54

Combine like terms: 45 + -54 = -9
-1x = -9

Divide each side by '-1'.
x = 9

Simplifying
x = 9

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