Question

1.tìm x a)x : 2/5 = 3/7 b) 6/5 - x = 7/8

Answer 1

a)x : 2/5 = 3/7 

= \(\dfrac{3}{7}x\dfrac{2}{5}=\dfrac{6}{35}\)

b) 6/5 - x = 7/8

\(x=\dfrac{6}{5}-\dfrac{7}{8}\)

\(x=\dfrac{13}{40}\)

 

Answer 2

a) x : 2/5 = 3/7

           x   = 3/7 x 2/5

           x   = 6/35

b) 6/5 - x = 7/8

             x = 6/5 - 7/8

             x = 13/40

#Tick cho mik nha

# học tốt :3

Answer 3

a)\(x=\dfrac{3}{7}\times\dfrac{2}{5}=\dfrac{6}{35}\)

b)\(x=\dfrac{6}{5}-\dfrac{7}{8}=\dfrac{48}{40}-\dfrac{35}{40}=\dfrac{13}{40}\)

Answer 4

a) \(x:\dfrac{2}{5}=\dfrac{3}{7}\)

\(x=\dfrac{3}{7}\times\dfrac{2}{5}\)

\(x=\dfrac{6}{35}\)

b) \(\dfrac{6}{5}-x=\dfrac{7}{8}\)

\(x=\dfrac{6}{5}-\dfrac{7}{8}\)

\(x=\dfrac{48}{40}-\dfrac{35}{40}\)

\(x=\dfrac{13}{40}\)

Answer 5

x=13/40