1. **State the problem:** Simplify the expression $(-42)(2)/-12$. 2. **Write the expression:** $$\frac{(-42)(2)}{-12}$$ 3. **Multiply the numerator:** $$\frac{-84}{-12}$$ 4. **Divide numerator and denominator by their greatest common divisor (12):** $$\frac{\cancel{-84}^{7}}{\cancel{-12}^{1}}$$ 5. **Simplify the fraction:** Since both numerator and denominator are negative, the negatives cancel out: $$\frac{7}{1} = 7$$ **Final answer:** $7$