Question

tìm x

(1/2-1/3+1/4):(1/6-1/x)=17,5

Answer 1

\(\frac{\frac{1}{2}-\frac{1}{3}+\frac{1}{4}}{\frac{1}{6}-\frac{1}{x}}=17.5\)

\(\frac{\frac{1}{6}+\frac{1}{4}}{\frac{1}{6}-\frac{1}{x}}=\frac{35}{2}\)

\(\frac{\frac{5}{12}}{\frac{1}{6}-\frac{1}{x}}=\frac{35}{2}\)

\(\frac{1}{6}-\frac{1}{x}=\frac{\frac{5}{12}}{\frac{35}{2}}\)

\(\frac{1}{6}-\frac{1}{x}=\frac{\frac{5}{12}}{\frac{35}{2}}\)

\(\frac{1}{6}-\frac{1}{x}=\frac{1}{42}\)

\(\frac{1}{x}=\frac{1}{6}-\frac{1}{42}\)

\(\frac{1}{x}=\frac{1}{7}\)

\(\Rightarrow x=7\)

CHÚC BẠN HỌC TỐT!!! :))