57=(x+4)(x+2)-(x+2)x

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Solution for 57=(x+4)(x+2)-(x+2)x equation:


Simplifying
57 = (x + 4)(x + 2) + -1(x + 2) * x

Reorder the terms:
57 = (4 + x)(x + 2) + -1(x + 2) * x

Reorder the terms:
57 = (4 + x)(2 + x) + -1(x + 2) * x

Multiply (4 + x) * (2 + x)
57 = (4(2 + x) + x(2 + x)) + -1(x + 2) * x
57 = ((2 * 4 + x * 4) + x(2 + x)) + -1(x + 2) * x
57 = ((8 + 4x) + x(2 + x)) + -1(x + 2) * x
57 = (8 + 4x + (2 * x + x * x)) + -1(x + 2) * x
57 = (8 + 4x + (2x + x2)) + -1(x + 2) * x

Combine like terms: 4x + 2x = 6x
57 = (8 + 6x + x2) + -1(x + 2) * x

Reorder the terms:
57 = 8 + 6x + x2 + -1(2 + x) * x

Reorder the terms for easier multiplication:
57 = 8 + 6x + x2 + -1x(2 + x)
57 = 8 + 6x + x2 + (2 * -1x + x * -1x)
57 = 8 + 6x + x2 + (-2x + -1x2)

Reorder the terms:
57 = 8 + 6x + -2x + x2 + -1x2

Combine like terms: 6x + -2x = 4x
57 = 8 + 4x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
57 = 8 + 4x + 0
57 = 8 + 4x

Solving
57 = 8 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
57 + -4x = 8 + 4x + -4x

Combine like terms: 4x + -4x = 0
57 + -4x = 8 + 0
57 + -4x = 8

Add '-57' to each side of the equation.
57 + -57 + -4x = 8 + -57

Combine like terms: 57 + -57 = 0
0 + -4x = 8 + -57
-4x = 8 + -57

Combine like terms: 8 + -57 = -49
-4x = -49

Divide each side by '-4'.
x = 12.25

Simplifying
x = 12.25

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