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Ajutor pls.. Dau inim!!!!!!

Ajutor Pls Dau Inim class=

Răspuns :

x/3=y/7=z/2 notăm cu K
x/3=3k
y/7= 7k
z/2=2k
x×y+y×z=175
3k ×7k+7k×2k=175
21k+14k=175
35k=175
k=175:35
k=5
x=3×5=>x=15
y=7×5=>y=35
z=2×5=>z=10