It is 72.
953.14
72
Add 'em up and divide by 3... you should get 76 and two-thirds. Another method: Add the excesses over 72 ie 14 + 0 + 0 = 14. 14/3 is 4 & two-thirds. Add that onto the 72 and you get 76 and two-thirds!
The answer is 66.85. Simply add the numbers together arithmetically as you would for two plus two and then divide by 14. To check your work, a calculator is always the best option.
(12x6)+(14/7)72+274
72 plus 72 is 144.
72 + 72 + 42 = 186
99 + 99 + 88 + 88 + 72 + 72 = 518
86
72 + 72 = 144
72/7 + 65/7 = 14/1 or 14