6=9x+12x

Solution for 6=9x+12x equation:

Simplifying
6 = 9x + 12x

Combine like terms: 9x + 12x = 21x
6 = 21x

Solving
6 = 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.
6 + -21x = 21x + -21x

Combine like terms: 21x + -21x = 0
6 + -21x = 0

Add '-6' to each side of the equation.
6 + -6 + -21x = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -21x = 0 + -6
-21x = 0 + -6

Combine like terms: 0 + -6 = -6
-21x = -6

Divide each side by '-21'.
x = 0.2857142857

Simplifying
x = 0.2857142857