Question

已知方程组2x+3y=m+3 4x-5=4m-1的解集是x>0 y

Answer 1

2x+3y=m+3 .1

4x-5y=4m-1.2

1式*2-2式

11y=7-2m

y=(7-2m)/11

x=(17m+12)/22

x>0

(17m+12)/22>0

17m+12>0

m>-12/17

y