Question

Aflati numerele rationale pozitive a,b,c stiind ca a/2=b/5=c/4 si 5a+8b-3c=190
Repede va rog.....

Answer 1

Ai răspuns pe foaie.

Answer 2

a/2=b/5=c/4=k=>
a=2k
b=5k
c=4k
5*2k+8*5k-3*4k=190
10k+40k-12k=190
38k=190
k=190/38
k=5
S={(10, 25, 20)}