Question 1205221
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If a ≡ -25 (mod 7) then a is equal to
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                    The question is posed  FATALLY  INCORRECTLY,

        showing that the "composer" does not understand the meaning of words.



<pre>
If a ≡ -25 (mod 7),  then we CAN NOT say to which number "a" is equal to.


We only can say that  

    a ≡ -25 (mod 7)  

is the same class of integer numbers as  

    a ≡ 3 (mod 7)  .


In other words, we only can say that if  a ≡ -25 (mod 7),  then  "a"  has the remainder 3 when is divided by 7.
</pre>

Fixed, &nbsp;solved, &nbsp;answered in a right way and fully explained.