Suppose that 11 = 49a - 7b + c, where a, b, c are all integers in {0, 1, 2, 3, 4, 5, 6}. What is b?
a=1 b=6 and c=4 since it has to be a number between 0 and 6 so the only way is 49-42+4=11 and that makes a=1,b=6, and c=4
