2x+3y=m+1 (1)
3x-y=2m-3 (2)
x+y=0 (3)
(1)-(3)x3
2x+3y-3x-3y=m+1
x=-m-1
(2)+(3)
3x-y+x+y=2m-3
4x=2m-3
x=(2m-3)/4
-m-1=(2m-3)/4
-4m-4=2m-3
-6m=1
m=-1/6
希望你能看懂,祝你学习进步
2x+3y=m+1 (1)
3x-y=2m-3 (2)
x+y=0 (3)
(1)-(3)x3
2x+3y-3x-3y=m+1
x=-m-1
(2)+(3)
3x-y+x+y=2m-3
4x=2m-3
x=(2m-3)/4
-m-1=(2m-3)/4
-4m-4=2m-3
-6m=1
m=-1/6
希望你能看懂,祝你学习进步