Question

Which value of x satisfies both -9x + 4y= 8 and -3x - y= 4 given the same value of y?A.(ol|--B.7OC.87D.-9OE.3

Answer 1

Answer:

Choice C. -8/ 7

Explanation:

We have to solve the system

$\begin{gathered} -9x+4y=8 \\ -3x-y=4 \end{gathered}$

Multiplying the equation at the bottom by -3 gives

$-9x-3y=12$

Now adding the two equations gives

$undefined$