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OpenStudy (anonymous):
Show that if gcd(a, b) = 1 and a | bc, then a | c
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ganeshie8 (ganeshie8):
As a start : you can find integers `x` and `y` such that : ` ax + by = 1 `
OpenStudy (anonymous):
Right, and there exist an integer m such that bc = ma. I don't know what to do next.
OpenStudy (zarkon):
multiply ax+by=1 by c
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