No, 9x - 3x is not 6, nor is it 6x. There is no simple one-term answer. The best that can be done is that it is 3x*(3x - 1).
x = 1
No! It equals 15, but 9-6=3.
9 3 to the power of 2 can be written 32, which is 3 squared, or 3 times 3.
9
-9 + 6 = -3.
15
-9 + 3 = -6
9-3=6
3 to the ninth power equals 19,683 while 9 to the fourth power equals 6,561 (if i'm not mistaken) so.. 9 to the fourth power (<) 3 to the ninth power
-6
15
3 to power of 6= 216 , 3 to power of 9= 729
6