Question

daca x;y:z sunt d.p cu 0,5;0,(3);0,25 si 2x+3y+8z=48. Aflati nr.

Answer 1

x=0,5k =k/2
y=0,(3)k=k/3
z=0,25k=k/4
2x+3y+8z=48
2×k/2+3×k/3+8×k/4=48
k+k+2k=48
4k=48
k=12
x=k/2=12/2=6
y=k/3=12/3=4
z=k/4=12/4=3