one-step equation

Solve the equation: 
x + 7 = 12

• x = 5
• x = 19
• x = -5
• x = 84

Solve the equation:
x - 4 = -3

• x = -7
• x = 1
• x = 12
• x = -12

Solve the equation:
x - 3 = -12

• x = 9 
• x = -15
• x = -9
• x = 15

Solve the equation:
x - 4 = 6

• x = 10
• x = -10
• x = 2
• x = -2

Solve the equation:
4p = 16

• p = 12
• p = -12
• p = -4
• p = 4

Solve the equation:
x/-3 = -4

• x = 12
• x = 1
• x = -1
• x = -12

Solve the equation:
-5x = 25

• x = 20
• x = -20
• x = -5
• x = 5

Solve for x:

• x = 20
• x = 7
• x = 10
• x = 3

r + 20 = 27

• r = 7
• r = 47
• r = 13
• r = 20

S + 4 = 24

• S = 28

• S = 6

• S = 18

• S = 20