Question

The sum of a number and 5 is less than -7? What could the number be?

Answer 1

I found: `x<-12`

Explanation:

Call the number `x`; you get:
`x+5<-7`
rearrange:
`x<-5-7`
`x<-12`

You can check:
if you choose `x=-11` you get:
`-11+5=-6` that is bigger than `-7`
If you choose `x=-13` you get:
`-13+5=-8` that works.