I know how to get the inverse of 3(mod 7), and thats about it.
What is the procedure to solve this?
7 Replies  2344 Views  Last Post: 11 October 2012  07:59 AM
#1
What are the solutions of the linear congruence 3x ≡ 4 (mod 7)?
Posted 28 September 2012  01:45 PM
Replies To: What are the solutions of the linear congruence 3x ≡ 4 (mod 7)?
#2
Re: What are the solutions of the linear congruence 3x ≡ 4 (mod 7)?
Posted 28 September 2012  01:46 PM
What is the remainder of 3 when you divide it by 7?
#3
Re: What are the solutions of the linear congruence 3x ≡ 4 (mod 7)?
Posted 28 September 2012  01:53 PM
#4
Re: What are the solutions of the linear congruence 3x ≡ 4 (mod 7)?
Posted 28 September 2012  02:06 PM
Ask yourself what number, x, times 3 mod 7 will give you 4?
3x ≡ 4 mod 7 # 4 mod 7 equals 4
3x mod 7 = 4 # what x makes this true
x = 6
Howto guide
Online solver
3x ≡ 4 mod 7 # 4 mod 7 equals 4
3x mod 7 = 4 # what x makes this true
x = 6
Howto guide
Online solver
#5
Re: What are the solutions of the linear congruence 3x ≡ 4 (mod 7)?
Posted 28 September 2012  03:48 PM
Sorry, I didn't see the congruence in the title! Make sure to include these things in your post as well.
#6
Re: What are the solutions of the linear congruence 3x ≡ 4 (mod 7)?
Posted 28 September 2012  03:53 PM
macosxnerd101, on 28 September 2012  05:48 PM, said:
Sorry, I didn't see the congruence in the title! Make sure to include these things in your post as well.
I think I did . Sorry if I wasnt clear enough.
Oh! BTW, how do you set this mathematical form. My brain in freezing; logarithm of 7 to the base 2 modulo 19
#7
Re: What are the solutions of the linear congruence 3x ≡ 4 (mod 7)?
Posted 28 September 2012  07:21 PM
Modular arithmetic is limited to the integers. Remember that log2(7) returns a real number.
#8
Re: What are the solutions of the linear congruence 3x ≡ 4 (mod 7)?
Posted 11 October 2012  07:59 AM
Thank you all
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