Solving One Step Equations With No Negatives

Summarize how to solve the equation.
z + 8 = 23

• Subtract 23 from both sides of the equation.
• Subtract 8 from both sides of the equation.
• Throw z away!
• Add 8 to both sides of the equation.

Summarize how to solve the equation.
50 = 12 + x

• Subtract 12 from both sides of the equation.
• Subtract 12 from the right side of the equation.
• Subtract 50 from both sides of the equation.
• Combine 50 and 12./

How can you "convince" someone that your solution to an equation is correct?

• Tell them ... "Just trust me!"
• Substitute your solution for the variable and make sure that both sides of the equation are "balanced."
• Just keep showing them how to solve the equation.

x + 12 = 20

• x = 32
• x = -32
• x = 8
• x = -8

Solve the equation.
15 = n + 7

• n = 22
• n = -8
• n = 8
• n = 7

Solve the equation.
46 = n + 19

• n = 37
• n = 27
• n = 65
• n = 30

11 + c  = 21

• c = -10
• c = -32
• c= 32
• c = 10

4x = 24

• x = 12
• x = 4
• x = 20
• x = 6

14 = n - 5

• n = 14
• n = 11
• n = 9
• n = 19

x - 5 = 17

• x = 12
• x = 22
• x = 41
• x = 6