Question

tìm x trong tỉ lệ thức sau:

(2x-1):10/7=28/15:4/3

Answer 1

\(\left(2x-1\right)\div\frac{10}{7}=\frac{28}{15}\div\frac{4}{3}\)

\(\Leftrightarrow\frac{2x-1}{\frac{10}{7}}=\frac{\frac{28}{15}}{\frac{4}{3}}\)

\(\Leftrightarrow\frac{4}{3}\left(2x-1\right)=\frac{10}{7}\times\frac{28}{15}\)

\(\Leftrightarrow\frac{4}{3}\left(2x-1\right)=\frac{8}{3}\)

\(\Leftrightarrow2x-1=2\)

\(\Leftrightarrow2x=3\)

\(\Leftrightarrow x=\frac{3}{2}\)

hok tốt nhé!