Question

[Pham Trong Bach]

Tìm x, biết:

a) (290 -  x).4 = 400;

b) x.3 - 2018: 2 = 23;

c) 38. x  - x.12 - x.16 = 40;

d) 280 - x .9 - x = 80.

Answer 1

[Cao Minh Tâm]

a) x = 190            

b) x = 344           

c) x = 4                

d) x = 20