A certain prosthodontist specializes in implanting gold and silver teeth in his patients’ mouths. He charges $650 for a gold tooth and $325 for a silver tooth. If his total fees for implanting gold and silver teeth last week were $15,925 in total, and he implanted five more gold teeth than silver teeth, how many teeth in total did he implant over the week?

A、
31
B、
32
C、
33
D、
34
E、
35

【正确答案】 A

【答案解析】

设金牙的数量为x，银牙的数量为y，故x=y+5，650x+325y=15925，故x=18.y=13，故本题选A项。