2x + 4x - 21 = 0
6x - 21 = 0
6x = 21
x=3.5
Answer:
87
Step-by-step explanation:
The answer would be 3.33333. I think because 10*15= 150. Then you would divide it by 45 and you would get 3.333. If you get it wrong im sorry.
I believe that the mean is 6
