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ajutor!!!dau coroana

Ajutordau Coroana class=

Răspuns :

a) dam factor 2 si obtinem in paranteza y+z; inlocuim

3x + 2(y+z)

3*23 + 2*41 = 69+82 = 151

b) 5x + 3(y+z) = 5*23 + 3*41 = 115 + 123 = 238

d) 4(y+z) -5x = 4*41-5*23 = 164-115 = 49

e) 7(y+z) -9x = 7*41-9*23 = 287-207 = 80