Question

Решите уравнение: 2,5х:4 целых 2/3=1/21:12
Заранее спасибо)))

Answer 1

$2,5x:4frac{2}{3}= frac{1}{21}:12 \ \ frac{25}{10} x:frac{14}{3}= frac{1}{21}:12 \ \ frac{25}{10} x*frac{3}{14}= frac{1}{21}* frac{1}{12} \ \ frac{75}{140} x= frac{1}{252} \ \ frac{15}{28} x= frac{1}{252} \ \ x= frac{1}{252}: frac{15}{28} \ \ x= frac{1}{252}* frac{28}{15}=frac{1}{63}* frac{7}{15}=frac{1}{9}* frac{1}{15}=frac{1}{135}$