21x-12x=

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Solution for 21x-12x= equation: 


Simplifying
21x + -12x = 0

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

Solving
9x = 0

Solving for variable 'x'.

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

Divide each side by '9'.
x = 0

Simplifying
x = 0

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