Determine x + y if (2?3?14) ( 2 ? 3 ? 1 4 )..

Question 1 Report

Determine x + y if $(\begin{matrix} 2 & - 3 \\ - 1 & 4 \end{matrix})$ $(\begin{matrix} x \\ y \end{matrix})$ = $(\begin{matrix} - 1 \\ 8 \end{matrix})$

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Determine x + y if (2?3?14) ( 2 ? 3 ? 1 4 ) (xy) ( x y ) = (?18)