Question

已知方程组3X+2Y=M+1,4X+Y=M-1 M为何值时,X大于Y

Answer 1

8x+2y=2m-2

5x=2m-3

x=(m-3)/5

y=(4+8m)/10

(m-3)/5＞(4+8m)/10

2m-6＞4+8m

-10＞6m

m＜-（3/5）