Daca din dublul unui numar scadem 18 obtinem 2.Aflati numarul.
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2
pai...10. ca.. 10 x 2 = 20......20-18=2

Răspunsuri

2014-10-20T19:25:44+03:00
2014-10-20T19:25:47+03:00
(x×2)-18 = 2
x×2= 18 + 2
x×2=20
x= 20:2
x= 10
12 4 12