[tex]M=\left\{x\:|\:x\:\in\:\mathbb{N} \: ,3x+6<2x+8\right\}[/tex]
[tex]3x + 6 < 2x + 8[/tex]
[tex]3x - 2x < 8 - 6[/tex]
[tex]x < 2[/tex]
[tex]x\:\in\:\mathbb{N}=>x \: \in \: \left\{0,1\right\}= > M=\left\{0,1\right\}[/tex]
[tex] = >\left\{2\right\} \not \subset\left\{0,1\right\} = > \left\{2\right\} \not \subset \: M[/tex]
