Question

Tìm x :

5 / 7 + x / 35 = 4 / 5

Answer 1

\(\frac{5}{7}+\frac{x}{35}=\frac{4}{5}\)

\(\Rightarrow\frac{x}{35}=\frac{4}{5}-\frac{5}{7}\)

\(\Rightarrow\frac{x}{35}=\frac{28-25}{35}\)

\(\Rightarrow\frac{x}{35}=\frac{3}{35}\)

\(\Rightarrow x=3\)

Vậy x = 3

Answer 2

\(\frac{5}{7}+\frac{x}{35}=\frac{4}{5}\)

            \(\frac{x}{35}=\frac{4}{5}-\frac{5}{7}\)

            \(\frac{x}{35}=\frac{28}{35}-\frac{25}{35}\)

\(\Rightarrow x=3\)

            \(\frac{x}{35}=\frac{3}{5}\)