Add seven to both sides of the equal sign. Now you have 3x= -18
Then divide by three on each side. Now you have x= -6
Then plug it in.
-6^2-6(-6)+9
The answer to that is 9
-2.6 I think is the correct answer
X=any number
x is( greater than sign) (and then a line at the bottom of the greater or less than sign) x
it would be like this
x is greater than or equal to x
or
x is less than or equal to x
1 2/3 . Hope this helps ;)