QuestionSelect the correct answer.
The elimination method is ideal for solving this system of equations. By which number must you multiply the second equation to eliminate the $y$-variable, and what is the solution for this system? $$\begin{array}{l} x+3 y=42 \\ 2 x-y=14 \end{array}$$ A. Multiply the second equation by -3 . The solution is $x=12, y=9$. B. Multiply the second equation by -2 . The solution is $x=12, y=10$. C. Multiply the second equation by 2 . The solution is $x=15, y=9$. D. Multiply the second equation by 3 . The solution is $x=12, y=10$.