Chapter P - Section P.9 - Linear Inequalities and Absolute Value Inequalities - Exercise Set - Page 140: 126

See explanations.

1. We can multiply or divide a negative number or expression on both sides of a linear equation, but for a linear inequality, we must flip the inequality symbol for the operation to be true. 2. We can switch sides of a linear equation, but for a linear inequality, we must flip the inequality symbol for the operation to be true.