1. SIMPLIFYING VARIABLE EXPRESSIONS Lesson 2-3

2. Simplifying Variable Expressions Review of Math Vocabulary: Term The combination/set of a number and variable(s) Like Terms Terms that have the SAME variable/set of variables Constant A number without a variable in its term Coefficient The number IN a term, next to variable(s)

3. Simplifying Variable Expressions Combining Like Terms: 5y + y *When you see a variable alone, it has an “invisible” 1 e.x. y = 1yg = 1g-f = -1f

4. Simplifying Variable Expressions Combining Like Terms (cont.): 8a + 5a 3b – b -4m – 9m

5. Simplifying Variable Expressions Combining Like Terms & Distributive Property: 4g + 3(3 + g) Steps: 1. Distribute 2. Combine like terms

6. Simplifying Variable Expressions Combining Like Terms & Distributive Property: 6y + 4m – 7y + m 4x + 3 – 2(5 + x)

7. Simplifying Variable Expressions Practice: a) 8a + 7 – 11ab) 3(w + 3) + 4w c) 10 + 7k – 2(3k + 5) d) -7(2r – 1) + 3(8 – r)

8. Homework p. 76 #11-16 all, 19-30 all