Question

Determinati numerele x,y si z stiind ca sunt invers proportionale cu 0,5 ; 0,(3) ; 0,25 si ca x +y+z=36. Va rog repede , dau coronita .

Answer 1

0,5=1/2
0,(3)=3/9=1/3
0,25=25/100=1/4
x/2=y/3=z/4      y=3x/2     z=4x/2=2x
x+3x/2+2x=36
2x+3x+4x=72
9x=72
x=8
y=3*8/2=12
z=2*8=16