3f-6=9f

Solution for 3f-6=9f equation:

Simplifying
3f + -6 = 9f

Reorder the terms:
-6 + 3f = 9f

Solving
-6 + 3f = 9f

Solving for variable 'f'.

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

Add '-9f' to each side of the equation.
-6 + 3f + -9f = 9f + -9f

Combine like terms: 3f + -9f = -6f
-6 + -6f = 9f + -9f

Combine like terms: 9f + -9f = 0
-6 + -6f = 0

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

Combine like terms: -6 + 6 = 0
0 + -6f = 0 + 6
-6f = 0 + 6

Combine like terms: 0 + 6 = 6
-6f = 6

Divide each side by '-6'.
f = -1

Simplifying
f = -1