For all integers a and b, a%b = (a + b)(a - b). If 7%x = 13, then which of the following could be a value of x?  Pick one:
A) -6
B) -5
C) 2
D) 3
E) 6
7%x = (7+x)(7-x)   49-x^2 = 13   x^2 = 36   x=-6,6   -6ns: -6
<result>A</result>
For all integers a and b, a%b = (a + b)(a - b). If 7%x = 13, then which of the following could be a value of x?