Solve Matrix Equations
-Let $\mathrm { A } = \left[ \begin{array} { r r } 7 & - 7 \\ - 4 & 0 \\ 10 & - 1 \end{array} \right]$

Solve Matrix Equations
-Let $\mathrm { A } = \left[ \begin{array} { r r } 7 & - 7 \\ - 4 & 0 \\ 10 & - 1 \end{array} \right]$ and $\mathrm { B } = \left[ \begin{array} { r r } 10 & 0 \\ 0 & - 2 \\ 7 & - 1 \end{array} \right] ; \quad 4 X + A = B$

A)
$\mathrm { X } = \left[ \begin{array} { c c } \frac { 3 } { 4 } & \frac { 7 } { 4 } \\ 1 & - \frac { 1 } { 2 } \\ - \frac { 3 } { 4 } & 0 \end{array} \right] \quad \mathrm { X } = \left[ \begin{array} { c c } - \frac { 3 } { 4 } & - \frac { 7 } { 4 } \\ - 1 & \frac { 1 } { 2 } \\ \frac { 3 } { 4 } & 0 \end{array} \right]$
B)
$X=\left[\begin{array}{cc}-\frac{3}{4} & -\frac{7}{4} \\-1 & \frac{1}{2} \\\frac{3}{4} & 0\end{array}\right]$

C)
$X=\left[\begin{array}{rr}3 & 7 \\4 & -2 \\-3 & 0\end{array}\right]$

D)
$X = \left[ \begin{array} { r r } - 3 & 7 \\ - 4 & 2 \\ 3 & 0 \end{array} \right]$