12x-21x=

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Solution for 12x-21x= equation: 


Simplifying
12x + -21x = 0

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