Question

Numerele naturale x,y,z sunt direct proportionale cu 3, 4 si 5. Aflati numerele stiind ca x+2y+3z=78

Answer 1

x,y,z dp 3,4,5 
x/3=y/4=z/5=K
x/3=K => x=3K
y/4=K=>y=4K
z/5=K=>z=5K
3K+2x4K+3x5K=78
3K+8K+15K=78
26K=78
K=3

x=3K=>x=3x3=9
y=4K=>y=4x3=12
z=5K=>z=5x3=15

P.S:Sper că te-am ajutat