Inactive Tutor answered 12/18/12
The best thing to keep in mind is this:
Put all the variables to the left hand side of the equation and all the constants to the right hand side.
Assuming you know how to do this, your new equation would be:
-2x - 5x + 9x = 6 - 6
∴ - 7x + 9x = 0
∴ 2x = 0
∴ x = 0
That would be your final answer.