Inequalities

This is an inequality:

2 < 4

Which means 2 is less than 4. Sometimes, you get inequalities with variables:

x + 9 > 4

And you have to solve them, in much the same way you solve an equation. To get rid of +9, we subtract 9, and the golden rule: what you do to one side, you do to the other!

We subtract 9 from 4, which makes -5. This is our answer:

x > -5

This means x is greater than -5.

This topic is pretty simple, but here's a quiz to make sure you know it 100%.