Question

Tìm x biết x+4/5=3/5+3/4

Answer 1

Viết lại đề cho dễ hiểu: Tìm x biết \(x+\frac{4}{5}=\frac{3}{5}+\frac{3}{4}\)

                                \(\Leftrightarrow x+\frac{4}{5}=\frac{27}{20}\)

                                \(\Leftrightarrow x=\frac{27}{20}-\frac{4}{5}\)

                                \(\Leftrightarrow x=\frac{11}{20}\)

Answer 2

\(x+\frac{4}{5}=\frac{3}{5}+\frac{3}{4}\)

\(x+\frac{4}{5}=\frac{12}{20}+\frac{15}{20}\)

\(x+\frac{4}{5}=\frac{27}{20}\)

\(x=\frac{27}{20}-\frac{4}{5}\)

\(x=\frac{27}{20}-\frac{16}{20}\)

\(x=\frac{11}{20}\)

Vậy \(x=\frac{11}{20}\)

_HT_