Question

21y > 84can you help me solving this?

Answer 1

Given the inequality

`21y>84`

We solve it as following:

`21y>84\rightarrow(21y)/(21)>(84)/(21)\rightarrow y>4`

Thereby, y has to be greater than 4.

`y>4`

As an interval,

`y\in(4,\infty)`

NOTE: Remember that dividing or multiplying an inequality by a negative number turns it around! Here we divided by 21, so it stayed the same.