17 + 14 + 17 + 19 + 18 + 13 + 11 = 109
-16
9 + 8 + 16 + 17 + 18 = 68
There are eighteen seventeens here. 18 times 17 is 306.
16 + 16 + 16 + 17 + 18 + 18 + 18 + 19 + 19 + 20 + 20 + 20 + 21 = 238
60 !.. 17+18=35... 35+25=60 !
17/18 + 12/18 = 29/18
The answer is 17/18
-6r + 1 = -17, then (17+1)=18=6r, so r=(18/6)=3. The answer is r=3
3
3
The answer is actually 17/18