Question

[hô đăng duy]

4x( 5- x) =x

1/2 ( x- 14) = 2

18/13 + 3x X = 3

1/3 9 (x + 12 ,5) =6

Answer 1

[Huỳnh Thị Minh Huyền]

a) 4 × (5 - x) = x

20 - 4x = x

x + 4x = 20

5x = 20

x = 20 : 5

x = 4

b) 1/2 (x - 14) = 2

x - 14 = 2 : 1/2

x - 14 = 4

x = 4 +14

x = 18

c) 18/13 + 3 × x = 3

3x = 3 - 18/13 

3x = 21/13

x = 21/13 : 3

x = 7/13

d) đề khó hiểu