x+9=-9

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Solution for x+9=-9 equation: 


Simplifying
x + 9 = -9

Reorder the terms:
9 + x = -9

Solving
9 + x = -9

Solving for variable 'x'.

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

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

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

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

Simplifying
x = -18

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