Question:
If $2\left(\begin{array}{cc}3 & 4 \\ 5 & x\end{array}\right)+\left(\begin{array}{ll}1 & y \\ 0 & 1\end{array}\right)=\left(\begin{array}{cc}7 & 0 \\ 10 & 5\end{array}\right)$
A. $(x=-2, y=8)$
B. $(x=2, y=-8)$
C. $(x=3, y=-6)$
D. $(x=-3, y=6)$
Solution:
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