Question

How do you solve `-2<3x+1<7`?

Answer 1

`-1< x< 2` or the interval `(-1,2)`

Explanation:

We start by subtracting 1 on each part of the equation:
`-3<3x<6`
Now we divide everything by 3 to make the x coefficient 1:
`-1< x< 2`
So our answer for x is `-1< x< 2` or the interval `(-1,2)`.