# Type of Equation

1. Jul 20, 2012

### confused slug

While reading a paper i have come across an equation in the following form;

a = b - f(c) $\leq$ 1

What is this style of equation called and how do you solve them?

Thanks
Confused

2. Jul 20, 2012

### Number Nine

It's not an equation, it's an inequality (or, half of it is). It means exactly what it says: a is equal to b - f(c), and both are less than or equal to 1. You can't do anything more with it until you know the values of the constants.

3. Jul 20, 2012

### confused slug

Thanks Number Nine. I am not familiar with this

The values are;

a = 1 - 0.8√13 $\leq$ 1

Thx
Confused

4. Jul 20, 2012

### haruspex

The author has determined (by some preceding working) that a = 1 - 0.8√13, and is now pointing out that this value is ≤ 1. Presumably the author needed to show that a ≤ 1, and has now done so.