We know that 30/25 is 1.2 or 1 1/5. SO if we divide 20 by that then we'll get 16.6667. So I won't give you the answer because its best that you learn to do this yourself because its more beneficial than telling you. What you have left is 16.6667=4x-4. Combine like terms and you'll get your answer. But if your still stuck then you can just let me know and I'll help you as much as I can.
How much bigger is B than A , so Side length B- A = (-4x+18) - (2x-7) = -6x+25 So perimeter = 4x length = 4x(-6x+25) = -24x+100 = 100-24x How much bigger? 100-24X
