Question

Solve the matrix equation

Answer 1

$\bf \begin{bmatrix} 4&-7\\1&8 \end{bmatrix}-X= \begin{bmatrix} -9&4\\-1&5 \end{bmatrix}\implies \begin{bmatrix} 4&-7\\1&8 \end{bmatrix}- \begin{bmatrix} -9&4\\-1&5 \end{bmatrix}=X \\\\\\ \begin{bmatrix} 4+9&&-7-4\\\\ 1+1&&8-5 \end{bmatrix}=X\implies \begin{bmatrix} 13&-11\\2&3 \end{bmatrix}=X$