Verified answer

Resposta:

x = 7/4, y = 4, z = 3

Explicação passo a passo:

[tex]4*\left[\begin{array}{cc}x&2&\\-z&1\\\end{array}\right] - \left[\begin{array}{cc}y&6&\\5&y\\\end{array}\right] = \left[\begin{array}{cc}3&2&\\7&0\\\end{array}\right][/tex]

[tex]\left[\begin{array}{cc}4x&8&\\-4z&4\\\end{array}\right] - \left[\begin{array}{cc}y&6&\\5&y\\\end{array}\right] = \left[\begin{array}{cc}3&2&\\7&0\\\end{array}\right][/tex]

[tex]\left[\begin{array}{cc}4x-y&2&\\-4z-5&4-y\\\end{array}\right] = \left[\begin{array}{cc}3&2&\\7&0\\\end{array}\right][/tex]

4x - y = 3

-4z - 5 = 7

4 - y = 0

4 - y = 0 -> y = 4

4x - y = 3

4x - 4 = 3

x = 7/4

-4z - 5 = 7

z = 3