Let's break down the equation:
1. \(x\): Represents the age of a person, the first individual.
2. \(x+3\): Represents the age of another person, likely someone older by 3 years than the first individual.
3. \(x-2\): Represents the age of yet another person, likely someone younger by 2 years than the first individual.
4. \(3(x+3)\): Represents three times the age of the second person, suggesting there are three individuals of the second person's age.
5. \(-1\): Represents a certain adjustment or correction, possibly indicating a year subtracted from the total sum.
The entire equation \((x) + (x+3) + (x−2) + 3(x+3) − 1=87\) is an expression of the sum of these ages, with the sum equaling 87. Jada is using the variable \(x\) to denote the age of the first person and then expressing the ages of the others in relation to \(x\).