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Explain how you know to use a variable in an addition or subtraction expression?

Explian how you know to use a variable in an addition or subtraction expression?

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.

This entry was posted on Tuesday, November 24th, 2009 at 5:12 pm and is filed under subtraction. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

2 Responses to “Explain how you know to use a variable in an addition or subtraction expression?”

  1. Jean Ann Says:
    November 24th, 2009 at 10:29 pm

    you use a variable if a value is not constant.
    References :

  2. czar Says:
    November 24th, 2009 at 10:42 pm

    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

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