x & gtm+2

Then 2m+ 1=- 1 and m+2.

Or m+2=- 1 and 2m+ 1

2m+ 1=- 1 and m+2

m=- 1，- 1+2 & lt； =- 1

wrong

M+2=- 1 and 2m+ 1

m=-3，-3+ 1 & lt； =- 1

find

So m=-3.