Question

giúp với ạ

Answer 1

\(a,x=\dfrac{4}{7}:\dfrac{3}{5}\\ x=\dfrac{20}{21}\\ b,x=\dfrac{1}{8}:\dfrac{1}{5}\\ x=\dfrac{5}{8}\\ c,x=\dfrac{2}{3}:\dfrac{3}{7}\\ x=\dfrac{14}{9}\\ d,x=\dfrac{11}{3}.\dfrac{8}{11}\\ x=\dfrac{8}{3}\\ e,x=\dfrac{2}{5}:\dfrac{1}{4}\\ x=\dfrac{8}{5}\)

Answer 2

Cái này mà bn,tự lm đi

Answer 3

\(a,\dfrac{3}{5}.x=\dfrac{4}{7}\Rightarrow x=\dfrac{20}{21}\)

\(b,\dfrac{1}{8}:x=\dfrac{1}{5}\Rightarrow x=\dfrac{5}{8}\)

\(c,x.\dfrac{3}{7}=\dfrac{2}{3}\Rightarrow x=\dfrac{14}{9}\)

\(d,x:\dfrac{8}{11}=\dfrac{11}{3}\Rightarrow x=\dfrac{8}{3}\)

\(e,\dfrac{2}{5}:x=\dfrac{1}{4}\Rightarrow x=\dfrac{8}{5}\)

Answer 4

a) x= 4/7 : 3/5

x= 20/21

b) x= 1/8 : 1/5

x= 5/8

c) 2/3 : 3/7

x= 14/9

d) x= 11/3 . 8/11

x= 8/3

e) x= 2/5 : 1/4

x= 8/5

Answer 5

a)\(\dfrac{3}{5}x=\dfrac{4}{7}\)
\(\Rightarrow x=\dfrac{4}{7}:\dfrac{3}{5}=\dfrac{4.5}{3.7}=\dfrac{20}{21}\)
b)\(\dfrac{1}{8}:x=\dfrac{1}{5}\)
\(\Rightarrow x=\dfrac{1}{8}:\dfrac{1}{5}=\dfrac{1.5}{8.1}=\dfrac{5}{8}\)
c)\(x.\dfrac{3}{7}=\dfrac{2}{3}\)
\(\Rightarrow x=\dfrac{2}{3}:\dfrac{3}{7}=\dfrac{2.7}{3.3}=\dfrac{14}{9}\)
d)\(x:\dfrac{8}{11}=\dfrac{11}{3}\)
\(\Rightarrow x=\dfrac{11}{3}.\dfrac{8}{11}=\dfrac{8}{3}\)
e)\(\dfrac{2}{5}:x=\dfrac{1}{4}\)
\(x=\dfrac{2}{5}:\dfrac{1}{4}=\dfrac{2.4}{5.1}=\dfrac{8}{5}\)