Answer:
$28.7
Step-by-step explanation:
From the date given, the total cost of the bill(food+tax+tip)=$33.
let express the above in mathematical form,
food=f,
tax=t,
tip=x
hence f+t+x=$33
let f+t=y (y=bill for food and tax)
hence
x+y=$33.......equation 1
since the tip paid is 15% of the total bill, hence
x=15%(y)-------equation 2
if we substitute equation 2 into equation 1 we arrive at
15%y+y=$33
0.15y+y=$33
1.15y=$33
y=33/1.15
y=$28.7
Hence the bill for the food and tax only is $28.7
