Start with the original equation (length + width= perimeter) 2l + 2w = P we know here that the length (l) is 2 more than the width (w), from this we can say [w= l+2] put the new w back into the equation 2l + [l+2] = P now the equation only has one variable, we can simplify it to 3l + 2 = P we know (from the given information in the origial problem) that the perimeter is 64. 3l + 2 = 64 tada, not we solve (subtract 2 from both sides) 3l = 62 (divide by 3) l = 20.67
