Step-by-step explanation:
Let's call x the unknown number.
Then, three times a number can be written as 3x
So, 3x subtracted from six can be written as: 6 - 3x
Finally, if 3 times a number subtracted from six is equal to negative nine, the equation is:
6 - 3x = -9
or
-3x +
Therefore, solving for x, we