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## Homework Statement

An object is placed a distance do in front of a concave mirror with a radius of curvature r = 6 cm. The image formed has a magnification of M = 4.3. Solve for the object's distance.

## Homework Equations

M = -d

_{i}/d

_{o}

(1/d

_{o}) + (1/d

_{i}) = 2/R = 1/f

## The Attempt at a Solution

I've tried to rearrange the magnification equation and sub it into the spherical mirror equation in order to cancel out the d

_{i}'s, so I can solve for d

_{o}using radius and magnification, except I'm still not even entirely sure how you would manage to make this work.

How would I rearrange these equations to solve for d

_{o}?