Răspuns
Explicație pas cu pas:
x/y=1,5
x/y=15/10=3/2
2x=3y (x=3y/2)
a) y/x=2/3
b) 3*x/5*y=3/5 * x/y=3/5 * 3/2=9/10
c) 2*x/3*y=2/3 * x/y=2/3 * 3/2=1
d) 2*y/3*x=2/3 * y/x=2/3 * 2/3=4/9
e) (x+y)/(x-y)= (am zis mai sus ca x=3y/2)
=(3y/2 + y)/(3y/2 - y)=(5y/2)/(y/2)=5y/2 * 2/y=5
