Question 409020
1) -1 > -x + 3 subtract 3. 
-1-3>-x add the left side.
-4>-x divide by -1
4<x ans.
Proof:
Let x=4.1
-1>-4.1+3
-1>-1.1

2) -7 - 2m >=-9 add seven.
-2n>=-9+7 add the right side.
-2n>=-2 divide by -2
n<=-2/-2 
n<=1 ans.
Proof:
-7-2*1>=-9
-7-2>=-9
-9>=-9

3)   a
    --- <=9
    -3
 cross multiply:
a>=9*-3
a>=-27 ans.
Proof:
-27/-3<=9
9>=9