1. What is an equation? An equation is a mathematical statement that two expressions are equal. For example, = 7 is an equation. Note: An equation contains an equal sign “ = ”; an expression does not contain an equal sign “=”. We solve equations, but we simplify expressions.

3. Is y = 7 the solution to the equation y – 3 = 4?

4. Is c = –9 the solution to the equation c + 3 = –7?

7. Solve h + 8 = 2. Then, check the solution.

8. Solve –8 = w – 1. Then, check the solution.

9. Solve c + 5.6 = 9. Then, check the solution.

10. Solve . Then, check the solution.