Question

How do you solve and graph the compound inequality `-1 < 2x + 5 < 13` ?

Answer 1

You first try to get the `x` 'free'

Subtract `5` everywhere:
`-6<2x<8`

Now divide everything by `2`
`-3 < x<4`

In the graph every `y`-value between -1 and 13 is valid:
graph{2x+5 [-24.9, 26.47, -4.01, 21.63]}