옆면의수를x라고두면꼭짓점의수는x+1이고모서리의수는2x입니다그러므로식을세우면옆면의수+꼭짓점의수+모서리의수=x+x+1+2x=49x+x+1+2x=49을정리하면4x=48x=12
당신은 어느 그룹입니까?