Question

DAU COROANA
URGENT!!

Answer 1

Răspuns:

0,4=4/10=2/5

0,5=5/10=1/2

0,75=75/100=15/20=3/4

x+y+3z=3

{x,y,z}ip{2/5,1/2,3/4}

2x/5=y/2=3z/4=k

2x/5=k rezulta x=5k/2

y/2=k rezulta y=2k

3z/4=k rezulta z=4k/3

5k/2+2k-3·4k/3=3

5k/2+2k-4k=3

5k/2-2k=3

(5k-4k)/2=3

k=3·2=6

x=5k/2=(5·6)/2=15

y=2k=2·6=12

z=4k/3=(4·6)/3=8

15+12-3·8=3

27-24=3

Explicație pas cu pas: