Question

Numerele naturale x, y, z sunt direct proportionale cu 0,1 , 0,2 , 0,3 iar 3x +2y+5z=110. Aflati x , y, z..

Answer 1

x=0,1. x=1/10. y=0,2. y=2/10. y=1/5. z=0,3. z=3/10. x=k/10. y=2k/10. z=3k/10. 3x=3k/10. 2y=4k/10. 5z=15k/10. 3k/10+4k/10+15k/10=110. 22k/10=110. 22k=110×10. 22k=1100. k=1100:22. k=50. x=50/10 x=5. y=100/10 y=10. z=150/10 z=15. Sper ca te-am ajutat.