Practice Examples

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 3A² – 3AB + 5B² for A = -4, B = -2.

7. Solve for A: A – 5 = -7

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

9. Solve for x:

10. Solve for A: 8A + 12 = 4A – 16

11. Solve: 5A + 3(2 – 2A) = 8 + A

12. 15% of what number is 21?

13. What percent of 80 is 24?

14. What percent of 24 is 6?

Answers:

1) 5d

2) 4A+1

3) –A-15

4) 28-10B

5) 15

6) 44

7) A=-2

8) A=6

9) X=-20

10) -7

1) -2A-2

2) 140

3) 30%

4) 25%