1. Algebraic Expression
A number sentence without an equal sign. It will have at least two terms and one operations.

2. Equation
A mathematical sentence formed by setting two expression equal to each other.

3. Term
Each part of an expression that is separated by either addition or subtraction.
Ex: y2 - 4x has 3 terms.

4. Variable
A letter a letter or symbol used to represent an unknown or unspecified number.
Ex: 15w

5. Coefficient Numbers that are multiplied by at least one variable.
Ex: 3a

6. Constant
A specific number whose value does not change.
Ex: y + 5

7. Solution A value of the variable that makes the equation true.
Ex: 7 is the solution to x+3=10.