#### crappiefisher26

##### New member

- Joined
- Jul 23, 2006

- Messages
- 49

Use the substitution zy=x to express

x to the 5 / z to the 3y to the 3 as a power of x.

Using laws of exponents, we obtain

xto the 5/ z to the 3y to the 3= x to the 5/ (zy) to the 3

If we then use the substitution zy=x we have

x to the 5/(zy) to the 3= x to the 5/ x to the 3

that equals= x to the 2. howd they get the 2?

heres the question im stuck on

x to the 7y to the 7/z, z=xy