解二元一次方程组初二上册数学课后同步练习题

(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