- #1

MathematicalPhysicist

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## Main Question or Discussion Point

in mathworld the definition of this is:"If bc=bd(mod a) and (b,a)=1 (i.e., a and b are relatively prime), then c=d (mod a)".

now lets see if i understand it relatively primes are "Two integers are relatively prime if they share no common positive factors (divisors) except 1" now let's say for the case of (3,2) or any other case we should translate it to b and a therefore (a+1,a)now lets put it the first formula like this:

(a+1)c-d(a+1)/a

(a+1)*(c-d)/a

now from this how can i get c-d/a or c=d (mod a)?

now lets see if i understand it relatively primes are "Two integers are relatively prime if they share no common positive factors (divisors) except 1" now let's say for the case of (3,2) or any other case we should translate it to b and a therefore (a+1,a)now lets put it the first formula like this:

(a+1)c-d(a+1)/a

(a+1)*(c-d)/a

now from this how can i get c-d/a or c=d (mod a)?