Question

How would I finish solving this image distance equation?

I know the formula would be 1/f = 1/do + 1/di. My data is as follows.

object distance = 3.0 cm
focal length = 1.5 cm

So the equation would be...

1/1.5 = 1/3 + 1/di

How would I solve the equation from here? Thanks!

Answer 1

@ash2326

Answer 2

@abb0t

Answer 3

If you minus 1/3 from both sides you get
1/1.5 -1/3 = 1/di
thats equal to
2/3 - 1/3 = 1/di
1/3 = 1/di
now you can just flip both sides
di = 3