Question

solve with a matrix equation: 4x-3y=15 2x+y=5

Answer 1

\[
\left[\begin{matrix}4&-3\\2&1\end{matrix}\right]\cdot
\left[\begin{matrix}x\\y\end{matrix}\right]=
\left[\begin{matrix}15\\5\end{matrix}\right]\\
A\cdot X=B\\
X=A^{-1}B
\]
find A inverse and multiply with B