Here is an example of how to evaluate a variable expression.  Remember to read the lesson on this topic.

Basic steps to follow:

1. First replace the variable with the value(s) in the given expression
2. Always double check that you plugged in the value(s) correctly before moving onto to simplify the expression
3. Use the order of operations to simplify the expression

Numbers and Operations-variables-1

 

Important habits to master math:

1. write out all steps
2. be very neat
3. use pencil not pen
4. review your work as your go
5. make sure you know the basics like fractions, positive and negative numbers and order of operations