Problema Solution
James bought 5 apples and 10 oranges for $4. Donald bought 3 apples and 9 oranges for $3.
What is the cost of an apple and an orange?
Answer provided by our tutors
let
a = the cost of an apple
o = the cost of an orange
James bought 5 apples and 10 oranges for $4:
5a + 10o = 4
Donald bought 3 apples and 9 oranges for $3:
3a + 9o = 3 divide both sides by 3
a + 3o = 1
by solving the system of equations:
5a + 10o = 4
a + 3o = 1
we find:
a = $0.4
o = $0.2
click here to see the step by step solution of the system of equations:
the cost of an apple is $0.4 = 40 cents.
the cost of an orange is $0.20 = 20 cents.