in Ginoni farm shop you can buy her free range hens eggs in boxes of 4,6,9,20 this means for example you can have 21 eggs by buying 2 boxes of 6 and 1 box of 9. List the quantities of eggs that are impossible to buy from her shop

Respuesta :

Number of eggs that can be bought from the shop must be in the form
E=4k + 6m + 9n + 20j

I will continue later ~