Question

The cost of 3 loaves of bread and 3 gallons of milk is $19.35. The cost of 4

loaves of bread and 2 gallons of milk is $17.90. How much does one loaf
of bread cost?

Answer 1

bread $2.5 milk $3.95

Explanation:

b=bread m= milk

3b +3m = 19.35

4b+2m= 17.90

Multiply the first by (-2)

Multiply the second by 3

Then add both

-6b -6m = -38.7

12b+6m=53.7

(when you add both 6m is cancelled)

6b = 15

b= 2.5 (BREAD $2.5)

4(2.5) = 10

10+ 2m = 17.90

2m = 7.90

m= 3.95 (MILK $3.95)