Упростим выражение:
$\frac{1}{12}х + \frac{11}{30}х - \frac{7}{18}х = \frac{15}{180}х + \frac{66}{180}х - \frac{70}{180}х = \frac{11}{180}х$
если $х = 5\frac{5}{11}$, тогда:
$\frac{11}{180}х = \frac{11}{180} * 5\frac{5}{11} = \frac{11}{180} * \frac{60}{11} = \frac{1}{3}$

Упростим выражение:
$\frac{1}{14}у + \frac{8}{21}у - \frac{3}{35}у = \frac{15}{210}у + \frac{80}{210}у - \frac{18}{210}у = \frac{77}{210}у = \frac{11}{30}у$,
если $у = 1\frac{4}{11}$, тогда $у = \frac{11}{30}у = \frac{11}{30} * \frac{15}{11} = \frac{1}{2}$.