Question

急！求20道解二元一次方程组练习题及答案！

急！求20道解二元一次方程组练习题及答案！

Answer 1

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（1) 66x+17y=3967 2
5x+y=1200 答案：x=48 y=47

(2) 18x+23y=2303

74x-y=1998 答案：x=27 y=79
(3) 44x+90y=7796
44x+y=3476 答案：x=79 y=48
(4) 76x-66y=4082 30x-y=2940
答案：x=98 y=51

(5) 67x+54y=8546
71x-y=5680
答案：x=80 y=59

(6) 42x-95y=-1410
21x-y=1575
答案：x=75 y=48

(7) 47x-40y=853
34x-y=2006
答案：x=59 y=48

(8) 19x-32y=-1786
75x+y=4950
答案：x=66 y=95

(9) 97x+24y=7202
58x-y=2900
答案：x=50 y=98

(10) 42x+85y=6362
63x-y=1638
答案：x=26 y=62

(11) 85x-92y=-2518
27x-y=486
答案：x=18 y=44

(12) 79x+40y=2419
56x-y=1176
答案：x=21 y=19

(13) 80x-87y=2156
22x-y=880
答案：x=40 y=12

(14) 32x+62y=5134
57x+y=2850
答案：x=50 y=57

(15) 83x-49y=82
59x+y=2183
答案：x=37 y=61

(16) 91x+70y=5845
95x-y=4275
答案：x=45 y=25

(17) 29x+44y=5281
88x-y=3608
答案：x=41 y=93

(18) 25x-95y=-4355
40x-y=2000
答案：x=50 y=59

(19) 54x+68y=3284
78x+y=1404
答案：x=18 y=34

(20) 70x+13y=3520
52x+y=2132
答案：x=41 y=50