As a waitress, at the end of the night you have to tip 3% (same as 1/33) of your total earnings to the bussers and hosts.
equation:
total earnings (E) times (3% or 1/33)= money tipped to bussers and hosts(T).
E*1/33=T
A.
So for 1 hour you pay 10 dolars then for 3 you pay 30 then for 11 you pay 110 then for 20 you pay 200.
For B and C I dont Know sorry.
1.B
2.e
3.8+10(x+3)+x
8+10x+30+x
11x=-30-8
x=38+11x