6x+3x=9+12x

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Solution for 6x+3x=9+12x equation: 


Simplifying
6x + 3x = 9 + 12x

Combine like terms: 6x + 3x = 9x
9x = 9 + 12x

Solving
9x = 9 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
9x + -12x = 9 + 12x + -12x

Combine like terms: 9x + -12x = -3x
-3x = 9 + 12x + -12x

Combine like terms: 12x + -12x = 0
-3x = 9 + 0
-3x = 9

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

Simplifying
x = -3

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