Răspunsuri

2014-05-12T22:04:11+03:00
X,y,z   dp cu 7, 11  ,5

x/7=y/11=z/5=k
x=7k
y=11k
z=5k

7k+11k+5k=2530
23k=2530
k=110
x=770lei
y=1210lei
z=550lei
Multumesc, o seara buna!
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2014-05-12T22:11:38+03:00

a+b+c=2530 lei

7/a=11/b=5/c=k⇒a=7k,b=11k,c=5k⇒7k+11k+5k=2530⇒23k=2530⇒k=2530/23⇒k=110

a=7k⇒a= 7·110⇒a=770lei

b=11k⇒b=11·110⇒b=1210lei

c=5k⇒c=5·110⇒c=550lei