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Ma ajuta cineva ?
14a+14b+14c+14x=
Stiind ca a+b+c=23 si x=9


Răspuns :

14a+14b+14c+14x= = 14 (a+b+c) + 14x = 14 * 23 + 14 * 9 = 14 (23 +9 )=
= 14 * 32 = 448
14a+14b+14c+14x=
14x(23+9)=
14x32=448