Question

tìm x biết

( \(6\frac{3}{7}\)- \(\frac{0.75x-2}{0.35}\)) . 2.8=10

 

Answer 1

\(\left(\frac{45}{7}-\frac{\frac{3}{4}x-2}{\frac{7}{20}}\right).\frac{14}{5}=10\)

\(\frac{45}{7}-\frac{\frac{3}{4}x-2}{\frac{7}{20}}=\frac{25}{7}\)

\(\frac{\frac{3}{4}x-2}{\frac{7}{20}}=\frac{20}{7}\)

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

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

\(x=4\)

Vậy x=4