math 8 solving 1 step equations

x - 4 = 17

• x = 21
• x = 13
• x = 19
• x = 24

5.    6b = 30

• x = 36
• x = 24
• x = 180
• x = 5

r/4 = 13

• r = 17
• r = 52
• r = 27
• r = 9

To solve the equation
x + 5 = 8
 I would ....

• subtract 5 from x
• subtract 5 from both sides
• subtract 5 from one side and add 5 to the other
• add 5 to both sides

in 3a =12,
I would....

• add 3 to both sides
• subtract 3 from both sides
• divide both sides by 3
• divide just the right by 3

a ÷ 5 = 30

• a = 6
• a = 30
• can't be solved
• a = 150

To solve 
2 + w = 20

• Add 2 and w = 22
• Multiply by 2 and w = 40
• Subtract 2 and w = 18
• Divide by 2 and w = 10

9z = 81 can be solved be doing the 

• inverse operation, which is divide both sides by 9
• inverse operation which is multiply both sides by 9
• duplicate operation which is divide both sides by 9
• fractal operation which is divide both sides by 9

to solve 6m = 12

• Multiply both sides by 6
• Divide both sides by 6
• Add 6 to both sides
• Subtract 6 from both sides

-10z = 40

• z = 50
• z = 30
• z = -4
• z = 4