What Colleen did first: a / -3 = 8
Multiply each side by -3 : a = -24 <= now we know integer 'a'
What she did next: 8 / b = -4
Multiply each side by 'b' : 8 = -4 b
Divide each side by -4 : -2 = b <== now we know integer 'b'
The quotient a / b = -24 / -2 = 12
