# Arithmetic Operation of Matrices

Suppose that $x$ and $y$ satisfy the following equation:

$\left(\begin{array}{cc}x& y \\2&1 \end{array}\right)\left(\begin{array}{cc}x&0 \\y& x \end{array}\right)=2\left(\begin{array}{cc}10&6-x \\3&0 \end{array}\right)+\left(\begin{array}{cc}5&2x \\4& x \end{array}\right).$

Evaluate $x+y.$

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