Question

Tìm y, biết :

4 / 15 : y = ( 4 / 5 + 1 / 2 ) x 4 / 13

Answer 1

\(\frac{4}{15}:y=\left(\frac{4}{5}+\frac{1}{2}\right)\times\frac{4}{13}\)

\(\frac{4}{15}:y=\frac{13}{10}\times\frac{4}{13}\)

\(\frac{4}{15}:y=\frac{2}{5}\)

\(y=\frac{4}{15}:\frac{2}{5}\)

\(y=\frac{2}{3}\)

Answer 2

\(\frac{4}{15}:y=\left(\frac{8}{10}+\frac{5}{10}\right)X\frac{4}{13}\)

\(\frac{4}{15}:y=\frac{13}{10}X\frac{4}{13}\)

\(\frac{4}{15}:y=\frac{2}{5}\)

\(y=\frac{4}{15}:\frac{2}{5}\)

\(y=\frac{4}{15}X\frac{5}{2}\)

\(y=\frac{2}{3}\)

HOK TỐT