x^2+x=x^2-3x+6x-18

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Solution for x^2+x=x^2-3x+6x-18 equation:


Simplifying
x2 + x = x2 + -3x + 6x + -18

Reorder the terms:
x + x2 = x2 + -3x + 6x + -18

Reorder the terms:
x + x2 = -18 + -3x + 6x + x2

Combine like terms: -3x + 6x = 3x
x + x2 = -18 + 3x + x2

Add '-1x2' to each side of the equation.
x + x2 + -1x2 = -18 + 3x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
x + 0 = -18 + 3x + x2 + -1x2
x = -18 + 3x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
x = -18 + 3x + 0
x = -18 + 3x

Solving
x = -18 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
x + -3x = -18 + 3x + -3x

Combine like terms: x + -3x = -2x
-2x = -18 + 3x + -3x

Combine like terms: 3x + -3x = 0
-2x = -18 + 0
-2x = -18

Divide each side by '-2'.
x = 9

Simplifying
x = 9

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