Problema Solution
The price of 2 pears and 6 apples is $14. The price
of 3 pears and 9 apples is $21. Can you determine the unit
prices for pears and apples? Explain
Answer provided by our tutors
let
p = the unit price for pears, p>0
a = the unit price for apples, a>0
The price of 2 pears and 6 apples is $14:
2p + 6a = 14 divide both sides by 2
p + 3a = 7
The price of 3 pears and 9 apples is $21:
3p + 9a = 21 divide both sides by 3
p + 3a = 7
p = 7 - 3a
we can not determine a unique unit price for pears and apples.