Question

How do you solve `4 + 2x < x + 13`?

Answer 1

Answer is `x<9` or `x in (-oo;9)`

Explanation:

`4+2x<x+13`

You begin with moving all expressions with `x` to left and all numbers to right:

`2x-x<-4+13`

Now you just have to add expressions on both sides to get the answer:

`x<9`