Determine x e y na igualdade.... Pergunta de ideia deAdriely18

May 2020 1 70 Report

Determine x e y na igualdade
$\left[\begin{array}{cc}x&3&\\4&y\end{array}\right] + \left[\begin{array}{cc}-1&5&\\8&y\end{array}\right] = \left[\begin{array}{cc}4&8&\\12&-6\end{array}\right]$

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alinter $\left[\begin{array}{cc}x-1&3+5\\4+8&y+y\end{array}\right] = \left[\begin{array}{cc}4&8\\12&-6\end{array}\right]\\
 \left[\begin{array}{cc}x-1&8\\12&2y\end{array}\right] = \left[\begin{array}{cc}4&8\\12&-6\end{array}\right]\\
x-1 = 4\\
x = 5\\
2y = -6\\
y = -3$

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