Only three terms have will "x" associated with them .....8x
And distributing the "-3" across the "6x" in the parentheses we get -18x
And when we distribute "9" across the"3x" in parentheses we get 27x...so.....
8x - 18x + 27x = 17x
Huh??.....those are the only three terms that have an " x " associated with them when we simplify this.....
I don't think I mis-added....
The things says that I am wrong, and I have one more chance. They don't make mistakes, I am pretty sure.
Here's the result from Wolfram Alpha........
It's known to be pretty reliable............ it has 17x, as wel.....