Question

How do you solve `-2 < 4z + 10 ≤ 12`?

Answer 1

`-2<4z+10<=12`
Subtract 10 from all the 3 members:
`-2-10<4z+10-10<=12-10`
`-12<4z<=2`
Devide by 4 all the three members:
`-3< z <=1/2`
That's all folks!