Question

1.aflati nr nat. x si z stiind ca sunt direct proportionale cu 3,5 iar suma lor este 24.
2.Aflati nr nat. a,b,c stiind ca sunt direct proportionale cu 4,9 respectiv 2,iar 5a-b-2c=42 repede va rog am nevoie urgent!!!

Answer 1

2) a,b,c dir.p 4,9,2
a:4=b:9=c:2=k
a=4k
b=9k
c=2k

5a-b-2c=42
5×4k-9k-2×2k=42
20k-9k-4k=42
7k=42
k=6

a=4×6
a=24

b=9×6
b=54

c=2×6
c=12

ver;
5a-b-2c=42
5×24-54-2×12=120-54-24=42

1) x,z dir. p.  3,5
x:3=z:5=k
x=3k
z=5k

x+z=24
3k+5k=24
8k=24
k=3

x=3×3
x=9

z=3×5
z=15

ver;
x+z=24
9+15=24

sper ca team ajutat