(x+5)(x-1)=(x)(x)-7

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Solution for (x+5)(x-1)=(x)(x)-7 equation:


Simplifying
(x + 5)(x + -1) = (x)(x) + -7

Reorder the terms:
(5 + x)(x + -1) = (x)(x) + -7

Reorder the terms:
(5 + x)(-1 + x) = (x)(x) + -7

Multiply (5 + x) * (-1 + x)
(5(-1 + x) + x(-1 + x)) = (x)(x) + -7
((-1 * 5 + x * 5) + x(-1 + x)) = (x)(x) + -7
((-5 + 5x) + x(-1 + x)) = (x)(x) + -7
(-5 + 5x + (-1 * x + x * x)) = (x)(x) + -7
(-5 + 5x + (-1x + x2)) = (x)(x) + -7

Combine like terms: 5x + -1x = 4x
(-5 + 4x + x2) = (x)(x) + -7

Multiply x * x
-5 + 4x + x2 = x2 + -7

Reorder the terms:
-5 + 4x + x2 = -7 + x2

Add '-1x2' to each side of the equation.
-5 + 4x + x2 + -1x2 = -7 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-5 + 4x + 0 = -7 + x2 + -1x2
-5 + 4x = -7 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-5 + 4x = -7 + 0
-5 + 4x = -7

Solving
-5 + 4x = -7

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + 4x = -7 + 5

Combine like terms: -5 + 5 = 0
0 + 4x = -7 + 5
4x = -7 + 5

Combine like terms: -7 + 5 = -2
4x = -2

Divide each side by '4'.
x = -0.5

Simplifying
x = -0.5

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