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ma puteti ajuta,va rog,repede,dau coroana

Ma Puteti Ajutava Rogrepededau Coroana class=

Răspuns :

4. a/1=b/4=c/7=(a+b+c)/(1+4+7)=120/12=10

a=10

b=4×10=40

c=7×10=70

5. a=12

b=30

6. a=10

b=60

7. a=72

b=108