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

but then you have to mult by 5

then x=xnot+bn/d

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

o ya then xnot is -25

x=-25+21n

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

you have to find all solutions

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

k so where do i go from here

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

so x is congruent to -25 is congruent to what

since (-25) is some solution for x

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

to get the complete solution

o crap ok now i see it

I don't know this stuff super well either lol

did you show eea?

yeah I put it in there

but theres no room

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

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

only up to 3

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

metoo

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

i dunno