The document defines key algebra concepts like equations, inverse operations, and properties used to solve equations. It provides examples of using inverse operations, commutative and identity properties, and subtraction rules to solve addition, subtraction, and open equations.

1. Algebra II

5. An Equation is like a balance scale. Everything must be equal on both sides. 10 5 + 5 =

6. When the amounts are equal on both sides it is a true equation. 12 6 + 6 =

7. When the amounts are unequal on both sides it is a false equation. 8 2 + 2 =

8. When an amount is unknown on one side of the equation it is an open equation. 7 n + 2 =

9. When you find a number for n you change the open equation to a true equation. You solve the equation. 7 n + 2 = 5