Question

How do you solve 4x≤12 or -7x≥21?

Answer 1

`x<= 3`

Explanation:

`4x<=12`
`rArr x <=3`

`-7x>=21`
`rArr x<= -3`

All solutions for `-7x>=21` are included in solutions for `4x<=12`

So only the restriction `x<=3` placed by `4x<=12` is significant.