Comments on: Explain how you know to use a variable in an addition or subtraction expression? http://www.mathstudenthelp.info/subtraction/explain-how-you-know-to-use-a-variable-in-an-addition-or-subtraction-expression Let us help you add it up! Sun, 12 Feb 2012 09:45:14 +0000 http://wordpress.org/?v=2.7 hourly 1 By: czar http://www.mathstudenthelp.info/subtraction/explain-how-you-know-to-use-a-variable-in-an-addition-or-subtraction-expression/comment-page-1#comment-6951 czar Wed, 25 Nov 2009 03:42:59 +0000 http://www.mathstudenthelp.info/subtraction/explain-how-you-know-to-use-a-variable-in-an-addition-or-subtraction-expression#comment-6951 Give an example. For example, if you have 10x + 6x it equals 16x. If you have 10x - 6x it equals 4x. What you cannot do is add or subtract different variables such as 10x - 4y. That stays 10x - 4y. I don't know if that answers your question.<br><b>References : </b><br>Self Give an example.

For example, if you have 10x + 6x it equals 16x.

If you have 10x - 6x it equals 4x.

What you cannot do is add or subtract different variables such as 10x - 4y. That stays 10x - 4y.

I don’t know if that answers your question.
References :
Self

]]> By: Jean Ann http://www.mathstudenthelp.info/subtraction/explain-how-you-know-to-use-a-variable-in-an-addition-or-subtraction-expression/comment-page-1#comment-6950 Jean Ann Wed, 25 Nov 2009 03:29:59 +0000 http://www.mathstudenthelp.info/subtraction/explain-how-you-know-to-use-a-variable-in-an-addition-or-subtraction-expression#comment-6950 you use a variable if a value is not constant.<br><b>References : </b><br> you use a variable if a value is not constant.
References :

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