Question

4. Determinati numerele x, y si z direct proportionale cu numerele 3, 4 şi 6, stiind ca.
a) z-y+x=10
b) x+y-z=4
C) y+z-x=21

Answer 1

Răspuns:

x=3k

y=4k

z=6k

a) 6k-4k+3k=5k

5k=10 => k=2

x=3 ×2 =6

y=8

z=12

b) 3k+4k-6k=k

=> k=4

x=4x3=12

y=16

z=24

c) 4k+6k-3k=7k

7k=21 => k=3

x=3x3=9

y=12

z=18