A letter that represents a number

A math problem that does not have an =. Example: 2+4 or x-7

A math problem with an = and "math" on both sides of the =. You can SOLVE it!!! Example: x+5=20 or 2x-7=21

A mathematical phrase involving numbers and operations but NO variables.

A mathematical phrase that includes one or more variables.

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Algebra 1B Chapter 1

Chapter 1

Question	Answer
Variable	A letter that represents a number
Expression	A math problem that does not have an =. Example: 2+4 or x-7
Equation	A math problem with an = and "math" on both sides of the =. You can SOLVE it!!! Example: x+5=20 or 2x-7=21
Numerical Expression	A mathematical phrase involving numbers and operations but NO variables.
Algebraic Expression	A mathematical phrase that includes one or more variables.