If I need to fence in an area of 50,000 sq feet and the fancy fence along the front is 20.00/ ft and the fencing along the other 3 sides is $5.00/ ft. The length of fancy fence is X what is the function for the cost of fence in terms of X?

Dup here:

https://www.askmehelpdesk.com/math-sciences/cost-function-formula-569631.html