9x=21x+84

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Solution for 9x=21x+84 equation: 


Simplifying
9x = 21x + 84

Reorder the terms:
9x = 84 + 21x

Solving
9x = 84 + 21x

Solving for variable 'x'.

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

Add '-21x' to each side of the equation.
9x + -21x = 84 + 21x + -21x

Combine like terms: 9x + -21x = -12x
-12x = 84 + 21x + -21x

Combine like terms: 21x + -21x = 0
-12x = 84 + 0
-12x = 84

Divide each side by '-12'.
x = -7

Simplifying
x = -7

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