Introductory Algebra for College Students (7th Edition)

(-6)-($\frac{12}{-4}$)=-3
The quotient of 12 and -4 can be written as $\frac{12}{-4}$. Since it is the difference between -6 and that fraction, we add (-6)- before the fraction. (-6)-($\frac{12}{-4}$)=(-6)-(-3)=-6+3=-3