Question

Trei nr sunt invers proportionale cu 2,5,si4. Aflati suma lor daca cel mai mic dintre ele 144,(3). multumesc mult!!

Answer 1

2x=k    x=k/2
5y=k    y=k/5= 144,(3)=(1443-144)/9=1299/9=433/3    k=433*5/3=2165/3
4z=k    z=k/4
x=(2165/3)/2=2165/6
z=(2165/3)/4=2165/12
x+y+z=2165/6+2165/12+433/3=(8660+4330+3464)/24=
=16454/24=685,58(3)