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In algebra, constants are numbers that do not change. They are fixed values, such as 6.75 and 0.25 in our exercise. When simplifying expressions, you often need to identify and combine these constants.
For example, in the expression (n + 6.75) + 0.25, we recognize the constants 6.75 and 0.25. By adding these constants together, we get 7. This step transforms our original expression into a simpler one: (n + 7).
Remember, combining constants is a key step in simplifying algebraic expressions. It reduces the complexity of the expression by handling the fixed numbers first.

Combining like terms is a fundamental skill in basic algebra. Like terms are terms that contain the same variables raised to the same power. In our exercise, we aren't dealing with multiplication or powers, but recognizing the constants as like terms is helpful.
In the expression (n + 6.75) + 0.25, the terms 6.75 and 0.25 are like terms because they are both constants. Adding them together, as we did, results in 7. So the expression simplifies to (n + 7).
By identifying and combining like terms, you can streamline an algebraic expression, making it easier to work with and understand.

Basic algebra involves working with variables, constants, and arithmetic operations to simplify and solve expressions and equations.
In the given exercise, we start with the expression (n + 6.75) + 0.25. The goal is to simplify it. We do so by following simple steps:
1. **Identify constants:** Locate the numbers that are not attached to any variables. Here, 6.75 and 0.25 are our constants.
2. **Combine constants:** Add the constants together. Adding 6.75 and 0.25 gives us 7.
3. **Write the simplified expression:** Replace the original constants with their sum to get (n + 7).
Understanding these basic steps helps demystify algebra. It guides you in breaking down expressions into manageable parts and simplifies them efficiently.