General Discussions

Equality and Inequality

We come across equality and inequality in our day today life in various means. However, one needs to understand the very basic interpretation of it. This post puts that out.

When we solve equality we get a value answer. For example:
If given is: x + 10 = 20
Then,
x = 20 – 10
x = 10

Let us consider an inequality:
10        <=    x + 5        <    20
Let us subtract by 5 to all the three terms. We remain with,
10-5    <=     x+5-5    <    20-5
5          <=     x             <    15
x lies between [5, 15)

Note: [ is an closed interval and ) open interval.

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