Question

 a , 2,5 : 4x = 0,5:0,2

b, \(\frac{1}{5}\)x :3 = \(\frac{2}{3}\): 0,25

 

mong anh chi giup em bai nay nha em cam on

Answer 1

a, <=> 2,5 : 4x = 2,5

<=> 4x = 2,5 : 2,5 = 1

<=> x=1 : 4 = 1/4

b, <=> 1/5.x:3 = 8/3

<=> 1/5.x = 8/3 . 3 = 8

<=> x = 8 : 1/5 = 40

Answer 2

cai lon me may

Answer 3

a)2,5:4x=0,5:0,2

2,5:4x=2,25

4x=2,5:2,25

4x=\(\frac{10}{9}\)

x=\(\frac{10}{9}\):4

x=\(\frac{10}{9}\).\(\frac{1}{4}\)

x=\(\frac{5}{18}\)

Vậy x=\(\frac{5}{18}\)

b)\(\frac{1}{5}\)x:3=\(\frac{2}{3}\):0,25

\(\frac{1}{5}\)x:3=\(\frac{2}{3}\):\(\frac{1}{4}\)

\(\frac{1}{5}\)x:3=\(\frac{8}{3}\)

\(\frac{1}{5}\)x=\(\frac{8}{3}\).3

0,2x=8

x=8:0,2

x=40

Vậy x=40

Answer 4

a)2,5:4x=0,5:0,2

2,5:4x=2,5

4x=2,5:2,5

4x=1

x=1:4

x=\(\frac{1}{4}\)

Vậy x=\(\frac{1}{4}\)