Ответ: 5 lk............

Ответ:

[tex]5lk[/tex]

Объяснение:

[tex] \frac{5}{12} lk + ( - \frac{1}{6} lk) + lk + (4lk - \frac{1}{4} )=\frac{1}{4}lk+lk+4lk-\frac{1}{4}lk =\frac{5}{4}lk+4lk-\frac{1}{4}lk =\frac{21}{4}lk-\frac{1}{4}lk =5lk [/tex]