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

问题描述:

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

(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