X-2/5=1/5 what is x explain how you got the answer

Someone me! if you’re smart you can solve this!

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.

If value of cos330° is √3/2 then find tan165°.