"one-third of the total of twelve times a number and twenty-seven"
12n + 27/3
4n + 9
Solve and check.
4x + 2 = 4x
First-Degree Equations and Inequalities is the chapter title. The section title is Equations in One Variable. And the exercise title/instructions are "Solve equations using the Addition and Multiplication Properties of Equations". Right at the beginning, it says, "Solve and check."