Finding object distance with only the focal length and magnification?

[Kristy92]

A magnifying glass has a diverging lens with a 13.0 cm focal length. At what distance from a toothpick should you hold this lens to form an image with a magnification of +5.00?

I simply have no idea what to do. I tied moving around the equations to make them work, but I can't figure it out.

Please help & thank you!

 

[supratim1]

Hi Kristy, Welcome to Physics Forums!you should have tried a bit more.

magnification = v/u = +5.

also, 1/f = 1/v - 1/u. f = -13cm for diverging lens.

solve.