-4x-5x=9

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Solution for -4x-5x=9 equation: 


Simplifying
-4x + -5x = 9

Combine like terms: -4x + -5x = -9x
-9x = 9

Solving
-9x = 9

Solving for variable 'x'.

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

Divide each side by '-9'.
x = -1

Simplifying
x = -1

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