daca 5 supra 2 inmultit cu x=125 supra 18

Răspuns :

5/2 · x = 125/18

5x/2 = 125/18

90x = 250

x = 2,(7)
5 / 2 · x = 125 / 18 

x = 125 / 18 : 5 / 2 = 125 / 18  ·  2 / 5 = 25 / 9 =  2,(7)