[tex]x \to prima \ latura \\ x+1 \to a2a \ latura \\ x+2 \to a3a \ latura \\ x+3 \to a4a \ latura \\\\\\ x+x+1+x+2+x+3=66 \\\\ 4x+6=66 \\\\ 4x=66-6 \\\\ 4x=60 \ \ \ |:4 \\\\ \boxed{x=15 dm \ are \ prima \ latura} \\\\\\ 15+1 \to 16 dm - a2a \ latura \\ 15+2 \to 17 dm-a3a \ latura \\ 15+3 \to 18dm -a4a \ latura[/tex]
