Term    : 1        Introducing Algebra (Algebra I ) Module : 1 - Capturing Data  Unit      : 3 - Thinking With Algebra  - Understanding Variables  Variables - pictorial representations
	A variable   is a letter (or combination of letters) that can represent a number. Variables are used in cases where a number can vary. Suppose you have 2 coins, and your friend gives you an unknown number of coins, we can represent that unknown number by using a variable.   Now look at the examples below: Represent the unknown number of coins you get by the variable A. If you had 2 coins before and now you have 3 coins, then the unknown number of coins you got from your friend is one. Therefore the variable   A = 1   in the first example.
	Now represent the unknown number of coins you get by the variable X. If you had 2 coins before and now you have 4 coins, then the unknown number of coins you got from your friend is two. Therefore the variable   X = 2   in the second example.   Now represent the unknown number of coins you get by the variable B. If you had 4 coins before and now you have 6 coins, then the unknown number of coins you got from your friend is two. Therefore the variable   B = 2   in the third example.  What is the value of Y in the next example ?
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