math

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2a + 7b + 17c = 31 How do you work out what a,b and c are?? any help would be appriciated

  • math -

    without more info, there's no way to assign a specific value to any of them.

    Just pick any value for c, cay c=1

    then you have

    2a+7b +17 = 31
    2a+7b=14

    Now, you can pick a=7, and then b=0
    or you can pick b=2 and then a=0
    or, you can pick a = -7, and then b=4

    and so on. In general, if you have three variables, you will need three separate equations which must all be satisfied to determine unique values for the variables.

  • math -

    Thanks for the pointer Steve! I'll try that :)

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