who is correct and why?

Question

chloe jonas
3<2x-5<7 3<2x-5<7
3<2x<12 8<2x<7
3/2<x<6 4<x<7/2

2) solve each inequality for x. assume a is constant and a>0

a. -3<ax+1< or equal to 5
b. -1/ax+6<1 or 2-ax>8

3) create an example of a compound inequality containing or that has infinitely many solutions.

Answer 1

chole 3<2x-5<7
3<2x<12
3/2<x<6

jonas
3<2x-5<7
8<2x<7
4<x<7/2

Answer 2

3<2x-5<7.
3+5<2x<7+5
8<2x<12
4<X<6.

Note: Add 5 to BOTH sides of the compound inequality.

2a. -3<ax+1<=5.
-3-1<ax<=5-1
-4<ax<=4
-4/a<X<=4/a.