1. Unit 4. Day 6.

2. Commercial Break #1 2 2𝑥 ∙ 𝑥 3𝑥 4 3 4 3 4 𝑥 3 4𝑥 1 ∙ 𝑥 1 7 1 1 1 7 𝑥
𝑥 7
𝑥 7 ∙ 𝑥

3. Commercial Break #1
5𝑛 6
5 6 𝑛
− 7𝑚 8
− 7 8 𝑚
1𝑎 2
1 2 𝑎
𝑎 2

4. Example A: Rewrite the expressions by collecting like terms
2 3 𝑥
2 3 𝑥− 3 4 𝑦+4𝑥− 𝑦 5 + 5𝑥 6
− 3 4 𝑦
+ 5𝑥 6
− 𝑦 5
+ 4𝑥
11 2 𝑥
− 𝑦
2 3 𝑥 𝑥 𝑥
− 3 4 𝑦
− 1 5 𝑦 15
6 𝑥 𝑥 𝑥 4 24 5 33
11 2 𝑥
− 20 𝑦− 20 𝑦 4
− 𝑦 = 6 𝑥 = =

5. Example B*: Rewrite the expressions by collecting like terms
5 8 − 𝑛 6 +3𝑛−1 3 4 − 3 2 𝑛
5 8
− 1 3 4
− 𝑛 6
− 3 2 𝑛
+ 3𝑛
− 9 8
− 9 8
4 3 𝑛
4 3 𝑛 + +
5 8
− 7 4
− 1 6 𝑛 𝑛
− 3 2 𝑛 8
8 − 8 5 14
− 6 𝑛 𝑛 − 6 𝑛 1 18
6 𝑛 −9 9 = 8 =

8. Commercial Break #2
2𝑥 3
2𝑥+5 3
5 3 +
8 11 − 5𝑦 11
8−5𝑦 11

9. Commercial Break #2 8𝑥 − 6 8𝑥−6 12 8𝑥 12 −6 12 12 12 8 12 𝑥 − 6 12
2 3 𝑥
− 1 2

10. Example C: Rewrite the following expression in standard form
2 3𝑥−4 6 − 5𝑥+2 8 4
6 − 5𝑥+2 8 6𝑥
− 8 3 4 3
24𝑥−32
24𝑥
−32
15𝑥+6
15𝑥
+ 6
24 − −
−15𝑥 −6 9𝑥
−38
9𝑥 24
38 24
3 8 𝑥
− 19 12
24𝑥
−32 24 = 24 = − =

11. Example D*: Rewrite the following expression in standard form
2 5𝑔−1 4 − 2𝑔+3 6 3 2
4 − 2𝑔+3 6
10𝑔
− 2 3 2
30𝑔−6
30𝑔 −6
4𝑔+6 4𝑔
+ 6
12 − −
−4𝑔 −6
26𝑔
−12
26𝑔 12 −6
12 12
13 6 𝑔
30𝑔 = 12 = − 12 = −1