Răspunsuri

2014-09-13T19:38:12+03:00
A,b,c   ip     cu 2,3,4

2a=3b=4c=k

a=k/2
b=k/3
c=k/4

6a+9b-4c=75

6*k/2+9*k/3-4*k/4=75

k/3 +3k-k=75

k/3+2k=75      aducem la acelasi numitor

k+6k=225
7k=225

k=225/7

a=225/7/2= 225/7 * 1/2= 225/14

b= 225/7/3= 225/7 * 1/3= 225/21

c=225/7/4=225/7 *1/4= 225/28
4 3 4