okie is a low western lowland gorilla living at the frankline park zoo near boston, ma. he loves to fingerpaint. many of his paintings have been sold because their colors are so interesting. one painting was sold for 5 times the amount of a second and a third was sold for $1500. if the total sale was for $13,500 how much did the most expensive painting sell for?

define a variable then write and solve an equation to solve the problem.
remember to write your answer as a complete sentence