-7x-13>_8 as a number line

Ineed to learn how to solve this problem

At dinner, 2/5 of the people had fish and 1/3 had chicken. if everyone else had lamb, what fraction of the people had lamb? and if 40 people had lamb , calculate the total number of people at the dinner.

For what value of (y) is 3^3/3^y =1/9