Question

Fie numerele a, b , c direct proportionale cu 2,3,5. Aflati numerele stiind ca suma lor este egala cu 180

Answer 1

{a,b,c} dp{2,3,5} a supra 2; b supra 3;c supra 5 =k a=2k-38 b=3k-54 c=5k-90 2k+3k+5k=180 10k=180 K= 180:10 K=18

Answer 2

(a,b,c)d.p.(2,3,5)
A supra(fractie)2=B supra 3=C supra 5
A+B+C
______=K
2+3+5
  
180
___=K
10

K=18

A=18x2=36
B=18x3=54
C=18x5=90