Question

*Sa se afle numărul x,y,z știind ca:
x + y + z = 90
x : y = 3
x : z = 6

Answer 1

x+y+z=90
x:y=3      y=x/3
x:z=6      z=x/6
x+x/3+x/6=90
6x/6+2x/6+x/6=90
9x/6=90
3x/2=90
x=90*2/3=60
x=60
y=60/3=20
y=20
z=60/6=10
z=10