(x-9)(x+7)=(x+4)(x+4)

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Solution for (x-9)(x+7)=(x+4)(x+4) equation:


Simplifying
(x + -9)(x + 7) = (x + 4)(x + 4)

Reorder the terms:
(-9 + x)(x + 7) = (x + 4)(x + 4)

Reorder the terms:
(-9 + x)(7 + x) = (x + 4)(x + 4)

Multiply (-9 + x) * (7 + x)
(-9(7 + x) + x(7 + x)) = (x + 4)(x + 4)
((7 * -9 + x * -9) + x(7 + x)) = (x + 4)(x + 4)
((-63 + -9x) + x(7 + x)) = (x + 4)(x + 4)
(-63 + -9x + (7 * x + x * x)) = (x + 4)(x + 4)
(-63 + -9x + (7x + x2)) = (x + 4)(x + 4)

Combine like terms: -9x + 7x = -2x
(-63 + -2x + x2) = (x + 4)(x + 4)

Reorder the terms:
-63 + -2x + x2 = (4 + x)(x + 4)

Reorder the terms:
-63 + -2x + x2 = (4 + x)(4 + x)

Multiply (4 + x) * (4 + x)
-63 + -2x + x2 = (4(4 + x) + x(4 + x))
-63 + -2x + x2 = ((4 * 4 + x * 4) + x(4 + x))
-63 + -2x + x2 = ((16 + 4x) + x(4 + x))
-63 + -2x + x2 = (16 + 4x + (4 * x + x * x))
-63 + -2x + x2 = (16 + 4x + (4x + x2))

Combine like terms: 4x + 4x = 8x
-63 + -2x + x2 = (16 + 8x + x2)

Add '-1x2' to each side of the equation.
-63 + -2x + x2 + -1x2 = 16 + 8x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-63 + -2x + 0 = 16 + 8x + x2 + -1x2
-63 + -2x = 16 + 8x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-63 + -2x = 16 + 8x + 0
-63 + -2x = 16 + 8x

Solving
-63 + -2x = 16 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
-63 + -2x + -8x = 16 + 8x + -8x

Combine like terms: -2x + -8x = -10x
-63 + -10x = 16 + 8x + -8x

Combine like terms: 8x + -8x = 0
-63 + -10x = 16 + 0
-63 + -10x = 16

Add '63' to each side of the equation.
-63 + 63 + -10x = 16 + 63

Combine like terms: -63 + 63 = 0
0 + -10x = 16 + 63
-10x = 16 + 63

Combine like terms: 16 + 63 = 79
-10x = 79

Divide each side by '-10'.
x = -7.9

Simplifying
x = -7.9

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