Răspunsuri

2014-10-29T20:20:55+02:00
(257+379)-a=121
636-a=121
a=636-121
a=515
Asta e un model
Acum poti sa ti le faci pe celelalte
2014-10-29T20:23:58+02:00
 636-a=121⇒a=-121+636=515
 b+615=918⇒b=918-615=303
c-461=329⇒c=329+461=790
d-422=379⇒d=379+422=801