Festive Simultaneous Equation

So something festive before the holidays finish… This simultaneous equation was asked in 1963! and not terribly different from something that might get asked today though the shilling (s) and pence (d) are long gone!

A couple of things to note if you want to give it a go (I had to look this up). There are 12 pence (d) in 1 shilling (s). So 1s =12d… Where it is written 5S.4D that means 5 shilling and 4 pence.

If you are a teacher you could knock a great lesson out of this combining units of measure, algebra, history (why d for pence?).