Question

(108/111-n)-6/111=50/111

48/53+(a+12/53)=10/53

Answer 1

$\frac{108}{111} - n = \frac{50}{111} + \frac{6}{111} = \frac{56}{111} \\ n = \frac{108}{111} - \frac{56}{111} = \frac{52}{111}$
$a + \frac{12}{53} = \frac{10}{53} - \frac{48}{53} = - \frac{38}{53}$
$a = - \frac{38}{53} - \frac{12}{53} = - \frac{50}{53}$