-9=9-x

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Solution for -9=9-x equation: 


Simplifying
-9 = 9 + -1x

Solving
-9 = 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 = 9 + -1x + x

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

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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