Chapter 2 - Equations, Inequalities, and Problem Solving - 2.3 Formulas - 2.3 Exercise Set - Page 100: 18

$h=d+64$

$\bf{\text{Solution Outline:}}$ To solve the given equation, $ d=h-64 $ for $ h ,$ use the properties of equality to isolate the variable. $\bf{\text{Solution Details:}}$ Using the properties of equality to isolate the variable, the equation above is equivalent to \begin{array}{l}\require{cancel} d=h-64 \\\\ d+64=h-64+64 \\\\ d+64=h \\\\ h=d+64 .\end{array}