Question

determinati numerele a,b,c stiind ca sunt direct proportionale cu numerele 6,8 si 10 si ca 2a+b+c=15.

Answer 1

a=6k
b=8k
c=10k

2a+b+c=15
12k+8k+10k=15
30k=15
k=1/2

a=6*1/2
a=6/2
a=3

b=8*1/2
b=8/2
b=4

c=10*1/2
c=10/2
c=5

Vf:

2*3+4+5=15?
6+4+5=15?
15=15 ADEVARAT