Question

giúp với ạ,cần gấp.hứa tick

a,4/x = 2/9

Ⅹ x 0,3 = ⅗

c X :, 1,1 = 3/4

d,121,8 : x = 5/9

Answer 1

a) \(\dfrac{4}{x}=\dfrac{2}{9}\)

    \(x=\dfrac{\left(4\times9\right)}{2}\)

    \(x=\dfrac{36}{2}\)

   \(x=18\)

b) \(x\times0,3=\dfrac{3}{5}\)

    \(x\times\dfrac{3}{10}=\dfrac{3}{5}\)

    \(x=\dfrac{3}{5}:\dfrac{3}{10}\)

    \(x=\dfrac{3}{5}\times\dfrac{10}{3}\)

    \(x=\dfrac{30}{15}\)

    \(x=2\)

c) \(1,1=\dfrac{3}{4}\) câu này thiếu 

d) \(121,8:x=\dfrac{5}{9}\)

    \(\dfrac{609}{5}:x=\dfrac{5}{9}\)

              \(x=\dfrac{609}{5}:\dfrac{5}{9}\)

              \(x=\dfrac{609}{5}\times\dfrac{9}{5}\)

              \(x=\dfrac{5481}{25}\)

Answer 2

c) \(x:1,1=\dfrac{3}{4}\)

    \(x:\dfrac{11}{10}=\dfrac{3}{4}\)

    \(x=\dfrac{3}{4}\times\dfrac{11}{10}\)

    \(x=\dfrac{33}{40}\)