Simplify this expression by substituting one number for x and a second number for y that have not been used in this discussion already:

uxzy

z-xy-y

Simplify this expression by substituting one number for x and a second number for y that have not been used in this discussion already:

uxzy

z-xy-y

## Comments

Bob,

Can you, at least, give us idea what's the rubric? or

Where did you get it from? What is the source? ...

I think this will help. sorry.....Bob

uxzy / z-xy-y