x(x-1)+4(x+1)=x(x+1)

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Solution for x(x-1)+4(x+1)=x(x+1) equation:


Simplifying
x(x + -1) + 4(x + 1) = x(x + 1)

Reorder the terms:
x(-1 + x) + 4(x + 1) = x(x + 1)
(-1 * x + x * x) + 4(x + 1) = x(x + 1)
(-1x + x2) + 4(x + 1) = x(x + 1)

Reorder the terms:
-1x + x2 + 4(1 + x) = x(x + 1)
-1x + x2 + (1 * 4 + x * 4) = x(x + 1)
-1x + x2 + (4 + 4x) = x(x + 1)

Reorder the terms:
4 + -1x + 4x + x2 = x(x + 1)

Combine like terms: -1x + 4x = 3x
4 + 3x + x2 = x(x + 1)

Reorder the terms:
4 + 3x + x2 = x(1 + x)
4 + 3x + x2 = (1 * x + x * x)
4 + 3x + x2 = (1x + x2)

Add '-1x2' to each side of the equation.
4 + 3x + x2 + -1x2 = 1x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
4 + 3x + 0 = 1x + x2 + -1x2
4 + 3x = 1x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
4 + 3x = 1x + 0
4 + 3x = 1x

Solving
4 + 3x = 1x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
4 + 3x + -1x = 1x + -1x

Combine like terms: 3x + -1x = 2x
4 + 2x = 1x + -1x

Combine like terms: 1x + -1x = 0
4 + 2x = 0

Add '-4' to each side of the equation.
4 + -4 + 2x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 2x = 0 + -4
2x = 0 + -4

Combine like terms: 0 + -4 = -4
2x = -4

Divide each side by '2'.
x = -2

Simplifying
x = -2

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