Question

0,75.x -2/5x= 7/20

Answer 1

0,35x=7/20

x=1

Answer 2

\(0,75.x-\frac{2}{5}.x=\frac{7}{20}\)

=> \(\frac{3}{4}.x-\frac{2}{5}.x=\frac{7}{20}\)

=> \(x\left(\frac{3}{4}-\frac{2}{5}\right)=\frac{7}{20}\)

=> \(x.\frac{7}{20}=\frac{7}{20}\)

=> x=1

Answer 3

0,75.x-2/5x =7/20 3/4x-2/5x =7/20 (3/4-2/5)x =7/20 (15/20-10/20)x=7/20 5/20.x =7/20 x =7/20:5/20 x =7/20.20/5 x =7/5

Answer 4

\(\frac{3}{4}-\frac{2}{5}=\frac{15}{20}-\frac{8}{20}=\frac{7}{20}\)

nha bạn

Answer 5

Cám ơn mn nhìu lém!!