8th review

Simplify

100

10x +4 + 10x -1

20x + 3

200

2x² - x² + 14 - 3 + 4x²

5x² +11

300

3x - 5 + x + 4x + 9

8x + 4

400

-17 + 2y + 5 - 6y + 42

30 -4y

500

8x + 2xy + 9x + 4y - 7 - xy + 3

17x +4y + xy - 4

Addition/Subtraction Equations

100

x + 24 = 7

x = -17

200

-2 = x + 13

-15 = x

300

x - 1.6 = 9.1

x = 10.7

400

4 + 21 = x + 5

20 = x

500

4 1/2 + 2.5 = x - 3 1/5

4.5 + 2.5 = x -3.2

7 = x - 3.2

10.2 = x

Miscellaneous

100

Simplify

-12 - (-8) =

-4

200

12a + 13 - 4a = 6a + 21

2a = 8

a = 4

300

4(3a + 2) = 2a + 18

12a + 8 = 2a +18

10a = 10

a = 1

400

Simplify

9(4a +2) + 50

36a + 18 + 50

36a + 68

500

a = 2   b = -1

-a³ + ab - b² + a²b =

-15

Multiplication/Division Equations

100

5x=30

x=6

200

p/4=-5

p=-20

300

5a/6=10

a=12

400

7x/-9 = 28

x = -36

500

Lisa's dog weighs twice as much as Nancy's dog. If Lisa's dog weighs 42 pounds. How much does Nancy's dog weigh?

2x = 42

x = 21

Multi Step Equations

100

-17 + 6x = -3x + 10

-27 = -9x

3 = x

200

-10 + 9x = -2x +12

11x = 22

x = 2

300

2(3x - 4) = 12 + 2x

4x = 20

x = 5

400

3x - 12 = 2(5x+ 1)

7x = -14

x = -2

500

3/4 (8x + 20) = 6x + 10

6x + 15 = 6x +10

0x = -5

0