Question

Tìm phân số a/b biết : a/b * 3/5 = 1/5+2/3

Answer 1

a/b*3/5=1/5+2/3

a/b*3/5=13/15

a/b=13/15:3/5

=> a/b=13/9

Vậy phân số a/b cần tìm là 13/9

ủng hộ nha

Answer 2

\(\frac{a}{b}\cdot\frac{3}{5}=\frac{1}{5}+\frac{2}{3}\)

\(\Rightarrow\frac{a}{b}\cdot\frac{3}{5}=\frac{3}{15}+\frac{10}{15}\)

\(\Rightarrow\frac{a}{b}\cdot\frac{3}{5}=\frac{13}{15}\)

\(\Rightarrow\frac{a}{b}=\frac{13}{15}:\frac{3}{5}\)

\(\Rightarrow\frac{a}{b}=\frac{13}{15}\cdot\frac{5}{3}\)

\(\Rightarrow\frac{a}{b}=\frac{13}{9}\)

Vậy \(\frac{a}{b}=\frac{13}{9}\)

Answer 3

Phân số a/b là 13/9 .

Answer 4

\(\frac{a}{b}\)x \(\frac{3}{5}\)=\(\frac{1}{5}\)+\(\frac{2}{3}\)

\(\frac{a}{b}\)x\(\frac{3}{5}\)=\(\frac{13}{15}\)

\(\frac{a}{b}\)           =\(\frac{13}{15}\):\(\frac{3}{5}\)

\(\frac{a}{b}\)           =\(\frac{13}{9}\)