(1)66x+17y=39672
5x+y=1200答案:x=48y=47
(2)18x+23y=2303
74x-y=1998答案:x=27y=79
(3)44x+90y=7796
44x+y=3476答案:x=79y=48
(4)76x-66y=408230x-y=2940
答案:x=98y=51
(5)67x+54y=8546
71x-y=5680
答案:x=80y=59
(6)42x-95y=-1410
21x-y=1575
答案:x=75y=48