Question

Create an equivalent system of equations using the sum of the system and the first equation

Answer 1

Answer:

$\large\boxed{A.\ \left\{\begin{array}{ccc}-3x+y=12\\-2x+4y=18\end{array}\right}$

Step-by-step explanation:

$\underline{+\left\{\begin{array}{ccc}-3x+y=12\\x+3y=6\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad-2x+4y=18\\\\\text{therefore}\\\\\left\{\begin{array}{ccc}-3x+y=12\\-2x+4y=18\end{array}\right$

Answer 2

Answer:

it's A

Step-by-step explanation: