Question

tìm x biết

\(\frac{2}{3}:\frac{x}{5}+\frac{5}{7}=\frac{2}{7}:\frac{3}{5}+\frac{10}{9}\)

Answer 1

\(\frac{2}{3}\div\frac{x}{5}+\frac{5}{7}=\frac{2}{7}\div\frac{3}{5}+\frac{10}{9}\)

\(\frac{2}{3}\div\frac{x}{5}+\frac{5}{7}=\frac{10}{21}+\frac{10}{9}\)

\(\frac{2}{3}\div\frac{x}{5}+\frac{5}{7}=\frac{300}{189}\)

\(\frac{2}{3}\div\frac{x}{5}=\frac{300}{189}-\frac{5}{7}\)

\(\frac{2}{3}\div\frac{x}{5}=\frac{55}{63}\)

\(\frac{x}{5}=\frac{2}{3}\div\frac{55}{63}\)

\(\frac{x}{5}=\frac{42}{55}\)

\(x=42\div\left(55\div5\right)=\frac{42}{11}\)

Answer 2

quy đồng lên có thế x phải hỏi

Answer 3

Bài cũng bình thường mà

Answer 4

\(\frac{2}{3}:\frac{x}{5}+\frac{5}{7}=\frac{2}{7}:\frac{3}{5}+\frac{10}{9}\)

\(\Leftrightarrow\frac{10}{3x}=\frac{10}{21}+\frac{10}{9}-\frac{5}{7}\)

\(\Leftrightarrow\frac{10}{3x}=\frac{55}{63}\)

\(\Leftrightarrow10\times63=55\times3x\)

\(\Leftrightarrow630=165\times x\)

\(\Leftrightarrow x=\frac{42}{11}\)

Vậy ...

Answer 5

= toi cha biet cau nay day cau nay la cau chuoi do

Answer 6

\(\frac{2}{3}:\frac{x}{5}+\frac{5}{7}=\frac{2}{7}:\frac{3}{5}+\frac{10}{9}\)

\(\Rightarrow\frac{2}{3}.\frac{5}{x}+\frac{5}{7}=\frac{2}{7}.\frac{5}{3}+\frac{10}{9}\)

\(\Rightarrow\frac{10}{3x}+\frac{5}{7}=\frac{10}{21}+\frac{10}{9}=\frac{100}{63}\)

\(\Rightarrow\frac{10}{3x}=\frac{100}{63}-\frac{5}{7}=\frac{55}{63}\)

\(\Rightarrow630=165x\)

\(\Rightarrow x=\frac{42}{11}\)