## Intermediate Algebra (12th Edition)

a) $b=P-a-c$ b) $c=P-a-b$
a) Using the properties of equality, in terms of $b ,$ the given formula, $P=a+b+c ,$ is equivalent to \begin{array}{l}\require{cancel} P-a-c=b \\\\ b=P-a-c .\end{array} b) Using the properties of equality, in terms of $c ,$ the given formula, $P=a+b+c ,$ is equivalent to \begin{array}{l}\require{cancel} P-a-b=c \\\\ c=P-a-b .\end{array}