Need Help-Cost analysis got me going crazy
So i have two options with a product
i want to know how many of product Y i have to buy before the lower cost outweighs the higher startup $$
Here is what i have come up with so far
Cost = 2500+1.05X
Cost = 600+1.10X
Maybe substitution method but i cannot figure out my two initial equations to start with.
i know i can plug in numbers all day to figure out the value, but the fact that i cannot come up with the true math formula will drive me crazy all weekend. Any help would be appreciated :)