Respuesta :

[tex]\begin{gathered} x+y=1 \\ 2x+2y=2 \\ \\ x+y=1 \\ 2(x+y)=2 \\ \\ \text{ thus we get} \\ x+y=1 \\ x+y=1 \\ \\ \text{ the we have infinite number of solutions} \end{gathered}[/tex]