Question

10supra20 împărțit la x egal 18supra30 va rog urgent

Answer 1

( 10/20) : x = 18/30
10/20 = 1/2  → simplific cu 10 ⇒  (10 : 10) / ( 20 : 10 ) = 1/2
18/30 = 3/5  → simplic cu 6    ⇒ ( 18 : 6 ) / ( 30 : 6 ) = 3/5

(1/2) : x = 3/5
x = 1/2 : 3/5 = 1/2 × 5/3 = 5/6
x = 5/6

Verific:   1/2 :  5/6 = 1/2 × 6/5 = 3/5   → am simplificat pe 6 cu 3 =2/1

Raspuns:   5/6 

Answer 2

10/20 : x = 18/30

10/20 × 1/x = 18/30 (am simplificat cu 2)

1/2 × 1/x = 9/15

1/2x = 9/15

9 × 2x = 15

18x = 15

x = 15/18 (am simplificat cu 3)

x = 5/6