Question

x/3=7/25+ -1/5

4/9 + x/5 =5/11

-5/9 + x/10=1/3

Answer 1

\(\dfrac{x}{3}=\dfrac{7}{25}-\dfrac{1}{5}\Leftrightarrow\dfrac{25x}{75}=\dfrac{21}{75}-\dfrac{15}{75}\Leftrightarrow25x=21-15\Rightarrow25x=6\Rightarrow x=0,24\)

Answer 2

a) Ta có: \(\dfrac{x}{3}=\dfrac{7}{25}+\dfrac{-1}{5}\)

\(\Leftrightarrow\dfrac{x}{3}=\dfrac{7}{25}+\dfrac{-5}{25}=\dfrac{2}{25}\)

hay \(x=\dfrac{6}{25}\)

Vậy: \(x=\dfrac{6}{25}\)

b) Ta có: \(\dfrac{4}{9}+\dfrac{x}{5}=\dfrac{5}{11}\)

\(\Leftrightarrow\dfrac{x}{5}=\dfrac{5}{11}-\dfrac{4}{9}=\dfrac{45}{99}-\dfrac{44}{99}=\dfrac{1}{99}\)

hay \(x=\dfrac{5}{99}\)

Vậy: \(x=\dfrac{5}{99}\)