题目应该是:师傅在徒儿这个年龄时,徒儿5岁徒弟在师傅这个年龄时,师傅71岁问师傅和徒弟各几岁?设师傅x岁,徒儿y岁y-(x-y)=52y-x=5...............1x+(x-y)=712x-y=71..............21式加2式乘2,得4x-x=71*2+53x=147x=49y=49*2-71=98-71=27师傅49岁,徒弟27岁
师傅76岁,徒弟71岁
徒儿5师傅71