Chapter 2 - Equations, Inequalities, and Problem Solving - 2.3 Formulas - 2.3 Exercise Set - Page 101: 49

$l=4t+w-108$

Using the properties of equality, in terms of $ l $, the given equation, $ t=27-\dfrac{1}{4}(w-l) $, is equivalent to \begin{array}{l} 4(t)=4(27)-1(w-l) \\\\ 4t=108-w+l \\\\ 4t-108+w=l \\\\ l=4t+w-108 .\end{array}