Answer:
A) multiply the bottom equation by 2
Step-by-step explanation:
Our goal in using the elimination method is to eliminate one variable so that we can solve for another independently.
Therefore, the first step would be to multiply the bottom equation by 2 so that the term with x becomes -4x so that it can cancel when the bottom equation Is added to the equation at the top.
Multiplying the bottom equation by -2 gives
Now, our system becomes
adding the two equations gives
we can now solve for y and then use its value to find the value of x.
Therefore, the correct first step in solving the equations is to multiply the bottom equation by 2.