Answer:
the cost of a liter of milk is

the cost of a loaf of bread is

Explanation:
Let
x------> the cost of a liter of milk
y------> the cost of a loaf of bread
we know that
------> equation A
------> equation B
Multiply equation A by

-------> equation C
Multiply equation B by

------> equation D
Adds equation C and equation D

Find the value of x
substitute the value of y in the equation A


