Question

[nguyen khanh ngoc]

1.Tìm X

30*X=22800:40

(x*30):40=840

372000:x=60*5

(72000:x):60=5

Answer 1

[Lê Phan Bảo Như]

a/30.x=2280040
   30.x=570
       x=570:30=19
b/(x.30):40=840
    x.30     =840.40
    x.30     =33600
    x         =33600:30=1120
c/37200:x=60.5
  37200:x=300
            x=37200:300=124
d/(72000:x):60=5
    72000:x     =5.60
    72000:x     =300
              x     =72000:300=240