Um… can someone else come up with a model answer? I’m pretty bad at model answers.
The first equation C=T+26 simply states that there are 26 more carton boxes than trays.
The second equation (C x 12) – 6 = T x 30 is now counting the actual number of eggs in each carton and tray. So (Cx12) – 6 is the total number of eggs repackaged, which is of course equal the Tx30 which is the original number of eggs Mr Lee bought.
So I reworked the equation until I get C which I then substituted in the equation for C in the first equation.