Find all positive solutions for the equation.
-x≡ 4 (mod 7)
A){4, 8, 12, ...}
B){4, 11, 18, ...}
C){1, 18, 25, ...}
D){11, 18, 91, ...}

Question

Quizplus · Accepted Answer

The correct set of solutions for the equation $x \equiv 4 \, (\text{mod} \, 7)$ includes all numbers that are 4 more than a multiple of 7. Starting with 4, if you add 7 repeatedly, you get 11, 18, 25, and so on, which matches option B.

Find All Positive Solutions for the Equation