If 3 slices of pizza and 6 waters cost $13.95, and 2 slices of pizza and 5 waters cost $9.65, find the cost of 1 slice of pizza and 1 water.

Answer 1

3p+6w= 13.95

p+2w=4.65

2p+4w=9.3

2p +5w= 9.65

subtract

w=35 cents for water

p=4.65-70 = $3.95 for pizza slice

check the answer

2(3.95)+5(.35) = 7.9+1.75= 9.65

3(3.95)+6(.35)=11.85+2.1=13.95