Contemporary Mathematics for Business & Consumers 8th Edition by Robert Brechner,Geroge Bergeman

Exercise 45

Grouping symbols are used to arrange numbers, variables, and operations. In this chapter, you learned to use the grouping symbols known as parentheses (). In addition to parenthese, other symbols used for grouping are brackets [ ] and braces { }. When solving equations with multiple grouping symbols, always start with innermost symbols and work to the outside.
In business, you may encounter situations that require you to set up equations with more than just parentheses. For practice, solve the following equation.
X = 6{2 + 3 [2 (9 - 3) + (8 + 1) - 4]}