解下列方程组:(1)4x+10y=36 15x-10y=8 (2)x-2y=3 3x-8y=13 (3)2x-y=6 x+2y=-2 (4)2x+3y=12 3x+4y=17
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人气:188 ℃ 时间:2019-10-18 03:02:30
解答
(1)4x+10y=36 15x-10y=8
x=44/19,y=64/19
(2)x-2y=3 3x-8y=13
x=-1,y=-2
(3)2x-y=6 x+2y=-2
x=14/5,y=-2/5
(4)2x+3y=12 3x+4y=17
x=3,y=2
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