Amanda - they're providing you with the training you want to remedy this one. one situation you realize to commence with is that the "perimeter" of the rectangle typically is the sum of the size of all 4 aspects, precise? So if the size of the rectangle is "l," and the width is "w," then the fringe will equivalent the size of the suitable and the bottom aspects, plus the suitable of the left and precise aspects. the fringe - enable's call it P, will = l + l + w + w, or P = 2 l + 2 w. Now, they have advised you a thanks to imagine about length, or "l," in words of width, or "w." in truth, l = w + 2 cm. Now, are you able to change (w + 2 cm) for l, interior the equation you've for P? in case you try this, you receives an equation for P that incorporates in common words "w" words and centimeters. and also you note of that P = fifty 2 centimeters. so so you could be in a position to discover the cost of w particularly certainly. you do not ignore that l = w +2, so once you realize what w is, you may then get what l is. and then you've solved the problem.