Question

0,4x - 1 intreg 2 cincimi = 2,44

Answer 1

        
$0,4x - 1 \frac{2}{5}=2,44 \\ \\ \frac{4}{10}x- \frac{7}{5}= \frac{244}{100} \\ \\ \frac{2}{5}x- \frac{7}{5}= \frac{61}{25} \\ \\ \frac{2}{5}x = \frac{61}{25} +\frac{7}{5} \\ \\ \frac{2}{5}x = \frac{61}{25} +\frac{35}{25} \\ \\ \frac{2}{5}x = \frac{96}{25} \\ \\ x=\frac{96}{25}:\frac{2}{5}=\frac{96}{25}*\frac{5}{2}=\frac{96*5}{25*2}= \boxed{\frac{48}{5}}$