Marty is 31 years younger than 6 times his friend Warren's age. The sum of their ages is less than 11.

What is the oldest age Warren can be?

M = 6w - 31

m + w < 11

6w - 31 + w < 11

7w - 31 < 11

7w < 11 + 31

7w < 42

w < 42/7

w < 6

oldest age warren can be is 5 ... but I do not see how that is possibly because if warren is 5, then marty is : 6 (5) - 31 = 30 - 31 = - 1

unless u make warrens age 5 1/2 ... making warrens age 2 ... wait, that wont work because u need a whole number