Question

aflati x,y,z stiund ca sunt invers proportionale cu numerele 1/2 ,1/3;0,4;0,2 si ca suma lor este 5

Answer 1

x/1/a
4/10=2/5
2/10=1/5
1/1/2=2
1/1/3=3
1/2/5=5/2
1/1/5=5
x/2=y/3=z/5/2=t/5=k
x=2k
y=3k
z=5k/2
t=5k
x+y+z+t=5
2k+3k+5k/2+5k=5
10k+5k/2=5
20k+5k=10
25k=10
k=10/25
k=2/5
x=4/5
y=6/5
z=1
t=2
0,8+1,2+1+2=5