Math Help - is this possible?

hello

can you tell me please if there is a solution to this problem:

a, b, c are percentages (10%, 35%, anything etc)
x y z are money amounts

Given that:
a < b < c
x + y = z

can we have this?

ax + by > zc
or at least equal

thanks

You can say that a,b & c are numbers between 0-1 (iff your max percentage 100%)

Originally Posted by Also sprach Zarathustra

You can say that a,b & c are numbers between 0-1 (iff your max percentage 100%)

okay, we can say that ofcourse

but is the last function valid?