posted by Clara .
A picture frame is 20cm x 16cm. There is 192cm squared of picture showing. Find the width of the frame.
Well if the width subtracts from the original dimensions,
solve for w.
inside the perenthesis you have to subtract 2 from 20 you should get 18 and if you subtract 2 from 16 you should get 14.multiply 18x14 and you should get 192 and that's how you check your answer.