If $A = [1324], B [3782]$ and $2 x + A = B$ then find $x$

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A = [1324], B [3782]

and

2 x + A = B

then find

x

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\begin{array}{l} A=\left( { \begin{array} { *{ 20 }{ c } }1 & 2 \\ 3 & 4 \end{array} } \right) ,\, \, B\left( { \begin{array} { *{ 20 }{ c } }3 & 8 \\ 7 & 2 \end{array} } \right) \\ 2x=B-A \\ 2x=\left( { \begin{array} { *{ 20 }{ c } }3 & 8 \\ 7 & 2 \end{array} } \right) -\left( { \begin{array} { *{ 20 }{ c } }1 & 2 \\ 3 & 4 \end{array} } \right) \\ 2x=\left( { \begin{array} { *{ 20 }{ c } }2 & 6 \\ 4 & { -2 } \end{array} } \right) \\ x=\frac { 1 }{ 2 } \left( { \begin{array} { *{ 20 }{ c } }2 & 6 \\ 4 & { -2 } \end{array} } \right) \to x=\left( { \begin{array} { *{ 20 }{ c } }1 & 3 \\ 2 & { -1 } \end{array} } \right) \end{array}

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