x-9+x-9=-9

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


Simplifying
x + -9 + x + -9 = -9

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

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

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

Solving
-18 + 2x = -9

Solving for variable 'x'.

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

Add '18' to each side of the equation.
-18 + 18 + 2x = -9 + 18

Combine like terms: -18 + 18 = 0
0 + 2x = -9 + 18
2x = -9 + 18

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

Divide each side by '2'.
x = 4.5

Simplifying
x = 4.5

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