(X+3)⼀2+(Y-5)⼀3=-1 (X-3)⼀2+(2Y-7)⼀3=-4 解方程组

2024-11-26 01:42:59
推荐回答(4个)
回答1:

(X+3)/2+(Y-5)/3=-1 (1)
(X-3)/2+(2Y-7)/3=-4 (2)
(1)变形得:x/2+3/2+y/3-5/3=-1 x/2+y/3=-1-3/2+5/3=-5/6 (3)
(2)变形得:x/2-3/2+2y/3-7/3=-4 x/2+2y/3=-4+3/2+7/3=-1/6 (4)
(4)-(3)得:y/3=4/6 y=4/6*3=2 代入(3)
得:x/2+2/3=-5/6 x/2=-5/6-2/3=-9/6=-3/2 x=-3/2*2=-3

回答2:

x = -3, y = 2

回答3:

(X+3)/2+(Y-5)/3=-1
(X-3)/2+(2Y-7)/3=-4
相减得:y=20,x=-9

回答4:

我不会 哈哈