Question

tìm y biết

242/363 + 1616/ 2121= 5/7 x y

Answer 1

242/363 + 1616/ 2121= 5/7 x y

\(\frac{2}{3}+\frac{16}{21}=\frac{5}{7}\)x y

\(\frac{14}{21}\)+\(\frac{16}{21}\)= \(\frac{5}{7}\)x y

\(\frac{10}{7}\)=\(\frac{5}{7}\)x y

\(\frac{10}{7}\): \(\frac{5}{7}\)=y

\(\frac{10}{7}\)x \(\frac{7}{5}\)=y

2=y

vậy y=2

Answer 2

\(\frac{242}{363}+\frac{1616}{2121}=\frac{5}{7}\times y\)

\(\frac{121\times2}{121\times3}+\frac{101\times16}{101\times21}=\frac{5}{7}\times y\)

\(\frac{2}{3}+\frac{16}{21}=\frac{5}{7}\times y\)

\(\frac{10}{7}=\frac{5}{7}\times y\)

\(\Rightarrow y=\frac{10}{7}:\frac{5}{7}\)

\(y=2\)

Answer 3

thank nhoa