x+9=-x-9

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Solution for x+9=-x-9 equation:


Simplifying
x + 9 = -1x + -9

Reorder the terms:
9 + x = -1x + -9

Reorder the terms:
9 + x = -9 + -1x

Solving
9 + x = -9 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
9 + x + x = -9 + -1x + x

Combine like terms: x + x = 2x
9 + 2x = -9 + -1x + x

Combine like terms: -1x + x = 0
9 + 2x = -9 + 0
9 + 2x = -9

Add '-9' to each side of the equation.
9 + -9 + 2x = -9 + -9

Combine like terms: 9 + -9 = 0
0 + 2x = -9 + -9
2x = -9 + -9

Combine like terms: -9 + -9 = -18
2x = -18

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

Simplifying
x = -9

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