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

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

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

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

我不会 哈哈

x = -3, y = 2

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