Question

How do you solve `2x - 3 >21`?

Answer 1

`x>12`, written in Interval form, `x in (12,oo).`

Explanation:

Adding `3` on both sides, we get, `2x-3+3>21+3`, i.e., `2x>24`

Next to isolate `x` on `LHS`, we multiply throughout by `1/2`, keeping in mind that as `1/2` is `+ve`, the order will not be affected.

Hence, `x>12`, written in Interval form, `x in (12,oo).`