9x=2x-21

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Solution for 9x=2x-21 equation: 


Simplifying
9x = 2x + -21

Reorder the terms:
9x = -21 + 2x

Solving
9x = -21 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
9x + -2x = -21 + 2x + -2x

Combine like terms: 9x + -2x = 7x
7x = -21 + 2x + -2x

Combine like terms: 2x + -2x = 0
7x = -21 + 0
7x = -21

Divide each side by '7'.
x = -3

Simplifying
x = -3

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