Question

Sa se afle x,y,z,stiind ca:
x : y = 3
x : z = 6
x + y + z = 90

Answer 1

Răspuns:

x:y=3=》x=3y

x:z=6=》x=6z

=》6z=3y

=》2z=y

6z+2z+z=90

9z=90

z=10

x=6*10=60

y=90-60-10=20