Question

a) x:4/5=25/4:5/4

b) 22/5:x=22/30:2/5

Answer 1

a,x:4/5=25/4:5/4

 x:4/5=5

      x=5.4/5

      x=4

Vậy x=4

(lưu ý:dấu . có nghĩa là dấu nhân bạn nhé)

b,22/5:x=22/30:2/5

  22/5:x=11/6

         x=22/5:11/6

         x=12/5

Vậy x=12/5

Answer 2

a.x:1/5=25/4:5/4

5x/4=25/4.4/5

5x/4=5

5x=20

x=4

Answer 3

a) x :  \(\frac{4}{5}\) = \(\frac{25}{4}\): \(\frac{5}{4}\)

    x : \(\frac{4}{5}\)   = 5

           x        = 5 x \(\frac{4}{5}\)

          x         = 4

b) \(\frac{22}{5}\): x = \(\frac{22}{30}\): \(\frac{2}{5}\)

     ​\(\frac{22}{5}\)​ : x = \(\frac{11}{10}\)

                   x = \(\frac{22}{5}\) : \(\frac{11}{10}\)

                   x =  \(\frac{22}{5}\)

Answer 4

Xin lỗi mình nhầm!

b)  \(\frac{22}{5}\): x = \(\frac{22}{30}\): \(\frac{2}{5}\)

     \(\frac{22}{5}\) : x =  \(\frac{11}{6}\)

                    x = \(\frac{22}{5}\): \(\frac{11}{6}\)

                    x = \(\frac{12}{5}\)