1. 1-8 An Introduction to Equations

2. Equation – a mathematical sentence that contains an equal sign (=).
Open sentence- a statement with one or more variables.
Neither true nor false until the variables have been replaced with specific values.
Solution – a value for the variable that makes an equation true.

3. True, False or Open? 24 + 18 = 20 + 22 7 ∙ 8 = 54 2x – 14 = 54
3y + 6 = 5y - 8

4. Is the given number a solution?
32 = 2x + 1; x = 6
6m – 8 = -15; m = 1/2

5. Write an equation The difference of a number and 7 is 8.
6 times the sum of a number and 5 is 16.
Joel is 11 years older than Mary. Write an equation that relates the age of Joel and the age of Mary

6. 4. A computer programmer works 40 hours per week
4. A computer programmer works 40 hours per week. What is an equation that relates the number of weeks w that the programmer works and the number of hours h that the programmer spends working.