User:Judedandre/sandbox

=Comparing Numbers= There are a number of ways to compare two arithmetic expressions. Two expressions may be compared to a sense of them being equal to each other or in value.

Equality
When two arithmetic expressions have an equal value, this is signified through an equals symbol (=). For example,
 * $$ 9 = 4 + 5 $$

In this equation, we see that the expression $$4 + 5$$ is equivalent to the number $$9$$. This means that the two expressions share the same value.

Substitution Property
Since the two expressions $$4 + 5$$ and $$9$$ are equal, we can replace them in any equation where either expression is. Take for example the following equations.
 * $$ a + 9 = a + (4 + 5) $$
 * $$ 9x = (4 + 5)x $$
 * $$ 9 - 46 = (4 + 5) - 46 $$

Inequality

 * greater than the second (>)
 * less than the second (<)
 * greater than  or  equal to the second (≥)
 * less than  or  equal to the second (≤)


 * 5>2 (reads: "Five is greater than Two")


 * 2<5 (reads: "Two is less than Five")


 * a ≥ b (reads: "A is greater than or equal to B". This means A could be equal to B or greater than B.)


 * a ≤ b (reads: "A is less than or equal to B". This means A could be equal to B or less than B.)