9x-6x=21

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Solution for 9x-6x=21 equation: 


Simplifying
9x + -6x = 21

Combine like terms: 9x + -6x = 3x
3x = 21

Solving
3x = 21

Solving for variable 'x'.

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

Divide each side by '3'.
x = 7

Simplifying
x = 7

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