Question

bài 1tìm x

x/8=-2/5*3/16

x+4/5=-1/7*14/15

 

Answer 1

\(\frac{x}{8}=\frac{-2}{5}\cdot\frac{3}{16}\)

\(\frac{x}{8}=\frac{-3}{40}\)

\(\Rightarrow x=\frac{8.\left(-3\right)}{40}=\frac{-3}{5}\)

Answer 2

\(\frac{x+4}{5}=\frac{-1}{7}\cdot\frac{14}{15}\)

\(\frac{x+4}{5}=\frac{-2}{15}\)

\(\Rightarrow x+4=\frac{5.\left(-2\right)}{15}=\frac{-2}{3}\)

\(\Rightarrow x=\frac{-14}{3}\)