encontre o valor de x, y e z de modo que 4 .![4.\left[\begin{array}{ccc}x&2\\-z&1\end{array}\right] -\left[\begin{array}{ccc}y&6\\5&y\end{array}\right] =\left[\begin{array}{ccc}3&2\\7&0\\\end{array}\right]](https://tex.z-dn.net/?f=4.%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Dx%26amp%3B2%5C%5C-z%26amp%3B1%5Cend%7Barray%7D%5Cright%5D+-%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Dy%26amp%3B6%5C%5C5%26amp%3By%5Cend%7Barray%7D%5Cright%5D+%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D3%26amp%3B2%5C%5C7%26amp%3B0%5C%5C%5Cend%7Barray%7D%5Cright%5D "4.\left[\begin{array}{ccc}x&2\\-z&1\end{array}\right] -\left[\begin{array}{ccc}y&6\\5&y\end{array}\right] =\left[\begin{array}{ccc}3&2\\7&0\\\end{array}\right]")
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Resposta:
X=51 Y=56 Z=45
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