Chapter 1 - Section 1.2 - Formulas and Percent - 1.2 Exercises - Page 61: 19

a) $x=\dfrac{C-B}{A}$ b) $A=\dfrac{C-B}{x}$

a) Using the properties of equality, in terms of $ x ,$ the given formula, $ Ax+B=C ,$ is equivalent to \begin{array}{l}\require{cancel} Ax=C-B \\\\ x=\dfrac{C-B}{A} .\end{array} b) Using the properties of equality, in terms of $ A ,$ the given formula, $ Ax+B=C ,$ is equivalent to \begin{array}{l}\require{cancel} Ax=C-B \\\\ A=\dfrac{C-B}{x} .\end{array}