Problema Solution
Strawberry jam costs 20p per pot more than a pot of marmalade.
Two pots of strawberry jam and three pots of marmalade cost £7.65.
Workout out the cost of a pot of marmalade
Answer provided by our tutors
Let
m = the cost of a pot of marmalade, m>=0
s = the cost of a pot of strawberry jam, s>=0
Strawberry jam costs 20p per pot more than a pot of marmalade:
s = m + 20
2 pots of strawberry jam and 3 pots of marmalade cost £7.65 = 765 p:
2s + 3m = 765
We have the following system of equations:
s = m + 20
2s + 3m = 765
........
click here to see the system of equations solved for s and m
........
m = 145 p = £1.45
s = 165 = £1.65
The cost of a pot of marmalade is £1.45.