Question

18:(6/7 - 3/5)
Кто решит получит 50 баллов

Answer 1

$\frac{18}{\frac{6}{7}-\frac{3}{5}}=\frac{18}{\frac{30}{35}-\frac{21}{35}}=\frac{18}{\frac{9}{35}}=\frac{18*35}{9}=2*35=70$

Answer 2

Ответ: 70

$18: (\frac{6}{7}-\frac{3}{5})=18:(\frac{6*5}{7*5}-\frac{3*7}{5*7}) = 18:(\frac{30}{35}-\frac{21}{35})=18:(\frac{9}{35})=18*\frac{35}{9}=\frac{18*35}{9}=\frac{18:9*35}{9:9}=\frac{2*35}{1}=70$