3 ≡ 4(mod 7)

For a ≡ b (mod n) to hold, n must divide a - b

a - b
n
  
3 - 4
7

Plug in a = 3, b = 4, and n = 7

a - b
n
  
3 - 4
7

a - b
n
  
-1
7


Since -1/7 ≠ -1 with no remainder, this congruence relation holds


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What is the Answer?
Since -1/7 ≠ -1 with no remainder, this congruence relation holds
How does the Congruence Modulo n Calculator work?
Free Congruence Modulo n Calculator - Given a possible congruence relation a ≡ b (mod n), this determines if the relation holds true (b is congruent to c modulo n).
This calculator has 3 inputs.
What 1 formula is used for the Congruence Modulo n Calculator?
if a ≡ b (mod n) then (a - b)/n is an integer
What 4 concepts are covered in the Congruence Modulo n Calculator?
congruence modulo n
Occurs when two numbers have a difference that is a multiple of n.
congruent
identical in form
modulus
the remainder of a division, after one number is divided by another.
a mod b
remainder
The portion of a division operation leftover after dividing two integers
Example calculations for the Congruence Modulo n Calculator
Congruence Modulo n Calculator Video

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