**How can I find an unknown "x" in a mod problem? Ex: 18 = x(mod 4) I should point out that the "=" has 3 lines - ex mod boats**

The easiest way is the Department of Defense in the number of gap

revealed that 18 divided by 4 = 4 remainder 2nd

Usually, we are more interested in the report than the rest, but we want the rest if MODS

18 = 2 mod 4

19 = 3 mod 4

20 = 0 mod 4

21 = 1 mod 4

22 = 2 mod 4

MOD review of these classes are always lower than the mod #

## Wednesday, November 11, 2009

### Ex Mod Boats How Can I Find An Unknown "x" In A Mod Problem? Ex: 18 = X(mod 4) I Should Point Out That The "=" Has 3 Lines

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## 1 comments:

For the problem "Find all x such that x is congruent to C (mod 4), for a constant C, there are only four possible answers, namely:

(4k, k integer) = (x such that every x is congruent to 0 mod 4)

(4k 1 ...) = (ALL x such that x is congruent to 1 mod 4)

Similarly, for 2 and 3

In this case 18 is congruent to 2 modulo 4, in particular, is equal to 2 + 4 * 4. The answer is all x such that x is congruent to 2 (mod 4), or whatever else your teacher prefers the spelling of the concept.

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