# Simplifying Expressions

**Math 0097 ***Simplifying Expressions*

**Simplify each of the following:**

1. 7d – 3d + d

2. 5A – 8 – A + 9

3. Simplify 2A – 5 – (3A + 10)

4. 2(B + 4) – 4(3B – 5)

5. Evaluate the expression 3(A – 4B) for A = -3, B = -2.

6. Evaluate the expression 3A^{2} – 3AB + 5B^{2} for A = -4, B = -2.

7. Solve for A: A – 5 = -7

8. Solve for A: -7A = -42

9. Solve for A: 8A + 12 = 4A – 16

10. Solve: 5A + 3(2 – 2A) = 8 + A

11. 15% of what number is 21?

12. What percent of 80 is 24?

13. What percent of 24 is 6?

**Answers**

- 5d
- 4A+1
- –A-15
- 28-10B
- 15
- 44
- A=-2
- A=6
- -7
- -2A-2
- 140
- 30%
- 25%