Answer the following questions — task. Mathematics CBSE, Class 8.

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I) Find out which one is not an equation.

$\frac{6 m}{17} - \frac{13 n}{17} = 6$
$x^{2} yz = 6 z$
$13 a^{2} = 6$
$6 xyz$

II) Find out which one is not a simple linear equation.

$\frac{6 m}{17} - \frac{13 n}{17} = 6$
$\frac{6 y^{2}}{17} + \frac{17}{13} y = 13,$
$13 a + 17 b = \frac{6}{30}$
$13 x + 17 y = 6 + 17$

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