7th Review 2

Simplify

100

5x - 2y + 3x + 8

8x -2y + 8

200

4n + 3n + (-5) + 2n + 6

9n + 1

300

-9 (x - y) + 3y

12y -9x

400

31 + 9n²s + 5 + n²s

10n2s + 36

500

xy² + 5 + 3xy² -2xy² + (-7)

2xy² - 2

addition equations

100

y + (-2) = 12

y = 14

200

k + (-4)² = -85

k = -101

300

r + 3² = -1

r = -10

400

v + 20 + 12 = -51

v = -83

500

6 + 2³ + x = 0

x = -14

subtraction equations

100

x - (-8) = 34

x = 26

200

x - 15 = 2²

x = 19

300

x - 4 - 9 =13

x = 26

400

w - (-5)² = 4

w = -21

500

32 - 4² + x = -1

x = -17

multiply equations

100

9x = 54

x = 6

200

28x = 700

x = 25

300

x + 3x = 28

x = 7

400

6x + 2x = -28 - 4

x = -4

500

4x + 7x -2x = 72

x = 8

multistep equations

100

6x - 16 = 8

x = 4

200

3- x/9 = 1

x = 18

300

-7x - 12 = 16 

x = -4

400

x/-2 -6 = -1

x = -10

500

21/x = -3

x = -7