- katieb

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- anonymous

when I did the EEA I got 4(-5) + 21(1) = 1

- anonymous

but then you have to mult by 5

- anonymous

then x=xnot+bn/d

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## More answers

- anonymous

when I multiplied by 5 I got 4(-25) + 21(5) = 5

- anonymous

o ya then xnot is -25

- anonymous

x=-25+21n

- anonymous

your way of writing things is different then how I did it

- anonymous

you have to find all solutions

- anonymous

yeah I got x is congruent to 17 (mod 21)

- anonymous

k so where do i go from here

- anonymous

from the EEA you just convert it back into congruent form I think

- anonymous

so x is congruent to -25 is congruent to what

- anonymous

so 4(-25) congruent to 5 (mod 21)
so x congruent to -25 (mod 21/1) is the complete solution
and that is equivalent to x congruent to 17 (mod21/1

- anonymous

since (-25) is some solution for x

- anonymous

then you just put it into the Linear Congruence Theorem, V1

- anonymous

to get the complete solution

- anonymous

o crap ok now i see it

- anonymous

I don't know this stuff super well either lol

- anonymous

did you show eea?

- anonymous

yeah I put it in there

- anonymous

but theres no room

- anonymous

the EEA for those were really short so I just wrote it in there tiny

- anonymous

have you done any other problems on the assignment? I'm stuck on 5c lol

- anonymous

only up to 3

- anonymous

ok well I guess I might try asking on here again then

- anonymous

metoo

- anonymous

4x(is equivalent to) 5(mod 21)
21 | 4x-5
21|4*(-4)-5
Hence -4 is a solution. ???
I am not sure.

- anonymous

i dunno

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