Question

tìm x 

( 3/5 . x - 0,75 ) : 3/7 = 2 4/5

Answer 1

         \(\left(\frac{3}{5}.x-0,75\right):\frac{3}{7}=2\frac{4}{5}\)

\(\Leftrightarrow\)\(\frac{3}{5}.x-0,75=2\frac{4}{5}.\frac{3}{7}=1\frac{1}{5}\)

\(\Leftrightarrow\)\(\frac{3}{5}.x=1\frac{1}{5}+0,75=1,95\)

\(\Leftrightarrow\)\(x=1,95:\frac{3}{5}=3,25\)

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