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Elementary Number Theory.. If a divides..

If a divides (2c+3d) and if (-a) divides (c+d) then show that 3a divides 3c.

The only progres I can say i've made is that it is basically asking to show that a divides c, because the 3 is only a constant.

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    A lost pink panda2012-09-18

1 Answers 1

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basically asking to show that a divides c

I am not a math person, but may be you can use GCD for this? Take GCD of the 2 numbers, if the result is the smaller number, then one does divide the other

a = 6;  c = 4;   If[GCD[c, a] == Min[{a, c}], Print["Yes"], Print["No"]]