Cindy's age, x, is 3 times her age 6 years ago which equation represents the statement x=3 (x-6) or x=3-6x or x=3x-6 or x=3x+6

Let's denote Cindy's age which is unknown with X

We know that Cindy's age is 3 times her age 6 years ago.

6 years ago Cindy's age was the present age (X) - 6 : X-6

The fact that the present age is 3 times her age 6 year ago can be written as:

3 * (X-6)

So, finally:

X=3 * (X-6)

X=3x+6

...

x = 9x