(x+8)(x-1)=(2x+1)(x-1)

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Solution for (x+8)(x-1)=(2x+1)(x-1) equation: 


Simplifying
(x + 8)(x + -1) = (2x + 1)(x + -1)

Reorder the terms:
(8 + x)(x + -1) = (2x + 1)(x + -1)

Reorder the terms:
(8 + x)(-1 + x) = (2x + 1)(x + -1)

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

Combine like terms: 8x + -1x = 7x
(-8 + 7x + x2) = (2x + 1)(x + -1)

Reorder the terms:
-8 + 7x + x2 = (1 + 2x)(x + -1)

Reorder the terms:
-8 + 7x + x2 = (1 + 2x)(-1 + x)

Multiply (1 + 2x) * (-1 + x)
-8 + 7x + x2 = (1(-1 + x) + 2x * (-1 + x))
-8 + 7x + x2 = ((-1 * 1 + x * 1) + 2x * (-1 + x))
-8 + 7x + x2 = ((-1 + 1x) + 2x * (-1 + x))
-8 + 7x + x2 = (-1 + 1x + (-1 * 2x + x * 2x))
-8 + 7x + x2 = (-1 + 1x + (-2x + 2x2))

Combine like terms: 1x + -2x = -1x
-8 + 7x + x2 = (-1 + -1x + 2x2)

Solving
-8 + 7x + x2 = -1 + -1x + 2x2

Solving for variable 'x'.

Reorder the terms:
-8 + 1 + 7x + x + x2 + -2x2 = -1 + -1x + 2x2 + 1 + x + -2x2

Combine like terms: -8 + 1 = -7
-7 + 7x + x + x2 + -2x2 = -1 + -1x + 2x2 + 1 + x + -2x2

Combine like terms: 7x + x = 8x
-7 + 8x + x2 + -2x2 = -1 + -1x + 2x2 + 1 + x + -2x2

Combine like terms: x2 + -2x2 = -1x2
-7 + 8x + -1x2 = -1 + -1x + 2x2 + 1 + x + -2x2

Reorder the terms:
-7 + 8x + -1x2 = -1 + 1 + -1x + x + 2x2 + -2x2

Combine like terms: -1 + 1 = 0
-7 + 8x + -1x2 = 0 + -1x + x + 2x2 + -2x2
-7 + 8x + -1x2 = -1x + x + 2x2 + -2x2

Combine like terms: -1x + x = 0
-7 + 8x + -1x2 = 0 + 2x2 + -2x2
-7 + 8x + -1x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-7 + 8x + -1x2 = 0

Factor a trinomial.
(-7 + x)(1 + -1x) = 0


Subproblem 1
Set the factor '(-7 + x)' equal to zero and attempt to solve:

Simplifying
-7 + x = 0

Solving
-7 + x = 0

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

Add '7' to each side of the equation.
-7 + 7 + x = 0 + 7

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

Combine like terms: 0 + 7 = 7
x = 7

Simplifying
x = 7

Subproblem 2
Set the factor '(1 + -1x)' equal to zero and attempt to solve:

Simplifying
1 + -1x = 0

Solving
1 + -1x = 0

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

Add '-1' to each side of the equation.
1 + -1 + -1x = 0 + -1

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

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

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

Simplifying
x = 1
Solution
x = {7, 1}

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