Question

Aflati numerele x y z stiind ca sunt direct proportionale cu 3, 7, 2 si yx+xz=175.

Answer 1

x/3=y/7=z/2=k

x=3k
y=7k
z=2k
x(y+z)=175
3k*9k=175
27k²=175
k=+-√(175/27)=+-(5√7)/3√3


x=(15√7)/3√3=(5√7)/√3
y=(35√7)/3√3
z=(10√7)/3√3
si
x=-(5√7)/√3
y=-(35√7)/3√3
z=-(10√7)/3√3