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Liam's breakfast was an egg and cheese biscuit with a carton of milk. He spent a total of $5.65. Finn spent $7.65 on an egg and cheese biscuit and two cartons of milk. How much was an egg and cheese biscuit?

User Ericharlow
by
7.6k points

1 Answer

4 votes

Answer:

An egg and cheese biscuit was $3.65.

Explanation:

Liam's breakfast was:


P = E + C + M

Where:

P: total price

E: egg

C: cheese biscuit

M: carton of milk


P = E + C + M


5.65 = E + C + M (1)

Now, Finn's breakfast was:


P = E + C + 2*M


7.65 = E + C + 2*M (2)

By subtracting equation (2) from (1) we have:


7.65 - 5.65 = 2M - M


M = 2

Hence, the price of a carton of milk is $2, so by entering this value into equation (1) we can find the price of an egg and cheese biscuit:


5.65 = E + C + M


5.65 - 2 = E + C


E + C = 3.65

Therefore, an egg and cheese biscuit was $3.65.

I hope it helps you!

User Kyobul
by
7.4k points
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