ma puteti ajuta,va rog,repede,dau coroana

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