21x=9x+54

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Solution for 21x=9x+54 equation: 


Simplifying
21x = 9x + 54

Reorder the terms:
21x = 54 + 9x

Solving
21x = 54 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
21x + -9x = 54 + 9x + -9x

Combine like terms: 21x + -9x = 12x
12x = 54 + 9x + -9x

Combine like terms: 9x + -9x = 0
12x = 54 + 0
12x = 54

Divide each side by '12'.
x = 4.5

Simplifying
x = 4.5

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