Question

The length of a rectangular frame is 3 cm more than the width. The area inside the frame is 40 square cm. Find the width of the frame.

Answer 1

l = 3+w
a = lw
a = w(3+w) = 40
40 = w(3+w)
w=5

Answer 2

Area is LxW

You can make the width equal to w and the length will be w+3

And the rest seemed to have appeared above :-)