Using a system of equations, it is found that it would charge £2.10 for Egg & Mash.
A system of equations is when two or more variables are related, and equations are built to find the values of each variable.
In this problem, the variables are:
From the menu choices, the equations are:
x + z = 3
y + z = 3.6
y + w = 2.7
The charge for Egg & Mash is of x + w, hence, from the second equation:
y = 3.6 - z
From the first:
z = 3 - x
Then:
y = 3.6 - 3 + x
y = 0.6 + x
Hence, replacing on the fourth:
y + w = 2.7
0.6 + x + w = 2.7
x + w = 2.1
It would charge £2.10 for Egg & Mash.
More can be learned about a system of equations at https://brainly.com/question/24342899
