Math algebra 1
posted by Dayana .
The cost of renting a circular saw at a hardware store is described by the function f(x) = 25x  10 in which f(x) is the cost and x is the time in days. If lewis has $200 to spend, what is the maximum number of days that he can rent a saw if tax is not considered?

25x  10 ≤ 200
solve for x, easy to solve