-21x+9x=0

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Solution for -21x+9x=0 equation: 


Simplifying
-21x + 9x = 0

Combine like terms: -21x + 9x = -12x
-12x = 0

Solving
-12x = 0

Solving for variable 'x'.

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

Divide each side by '-12'.
x = 0

Simplifying
x = 0

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