Question

afla z x y daca x:y=3
x:z=6
x+z+y=90

Answer 1

x:y=3 => y=x:3
x:z=6 => z=x:6

x+z+y=90
x+x:6+x:3=90 inmultim ecuatia cu 6
6x+x+3x=540
10x=540 => x=54
y=x:3=54:3=18
z=x:6=54:6=9