{4x-3y-10=0 3x-2y=0,{3x-4(x-y)=2 2x-3y=1,{2(x+y)-(x-y)=3 (x+y)-2(_数学解答

{4x-3y-10=0 3x-2y=0,{3x-4(x-y)=2 2x-3y=1,{2(x+y)-(x-y)=3 (x+y)-2(x-y)=1

人气：382 ℃　时间：2020-03-20 13:52:32

解答

4x-3y-10=0 8x-6y=20 3x-2y=0 9x-6y=0x=-20,y=-303x-4(x-y)=2 3x-4x+y=2 x-y=-2 3x-3y=-62x-3y=1x=-7,y=-52(x+y)-(x-y)=3 4(x+y)-2(x-y)=6 (x+y)-2(x-y)=1 2(x+y)-4(x-y)=23(x+y)=5 3(x-y)=13x+3y=5 3x-3y=16x=6 ,x=...