Question

Ca rog urgent daca x y z sunt invers proportionale cu 1/2 1/3 0,4 0,2 iar suma lor este 5 aflati x y z .Urgent!!!!

Answer 1

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

verificare 4/5+6/5+1+2=2+3=5