2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/128233In this paper one shows if the number of natural solutions of a general linear equation is limited or not. Also, it is presented a method of solving the Diophantine equation $ax-by=c$ in the set of natural numbers, and an example of solving in $N$ a Diophantine equation with three variables.4 pagesGeneral Mathematics11D04, 11D72text