HOW DO YOU DO THIS: 5 < 2x + 9< 15?

5 < 2x + 9< 15

5-9 < 2x < 15-9

-4 < 2x < 6

-4/2 < x < 6/2

-2 < x < 3
.,.,.

- 4 < 2 x < 6

- 2 < x < 3

to get x by itself you do operations to all parts of the inequality. You subtract 9 from 5 and 15 and you divide 2 into 5 and 15. the answer is --2<x<3

5 < 2x + 9 < 15
5 - 9 < 2x < 15 - 9
-4 < 2x < 6
-4/2 < x < 6/2
-2 < x < 3