1. 1-5 Equations Goals: Solve equations with one variable
Solve equations with two variables.

2. Vocabulary
Open Sentence – a math statement that contains algebraic expressions and symbols.
Equation – two expressions connected by an equal sign.
Solution– any number that makes a true statement when it replaces the variable in an equation.

3. Vocabulary
Replacement set – the set of values to be substituted into an expression.
Solution set – the set of all solutions to an equation.

4. Find the solution set for 4a + 7 = 23 if the replacement set is {2, 3, 4, 5, 6}.
Answer: The solution set is {4}.

5. Examples
Find the solution set of each equation if the replacement set is y:{2,3,4,5,6}
3y + 6 = 21 5
2y + 5 = 17 6

6. Find the solution set for 6c – 5 = 7 if the replacement set is {0, 1, 2, 3, 4}.
B. {2}
C. {1}
D. {4}

7. Practice
Page 36 #1-5

8. Equations with Two Variables
Make a table of values for each equation if the replacement set is {0, 2, 4, 6, 8}
y = 3x + 12
y = -5x + 7
y = 1 2 x – 4

9. More Practice
Page 37 #37, 38

10. Homework
Pages #11-18
#57-60