If `(c-3d)/(4)=(d)/(2)`, what is the ratio of c to d?

If 3(c+d)=5, what is the value of c+d?

If a= 2b/3, b= 2c/3, and c=2d/3, then find the ratio of b and d:

The ratio of salary of A:B=1:2,B:C=3:4, C:D=5:6 and D:E=7:8 What is the ratio of salary of A and E?

In the adjoining figure, D E is parallel to B C and A D=1c m , B D=2c m . What is the ratio of the area of /_\ A B C to the area of /_\ A D E ?