Addition & Subtraction Equations

n + 8 = 12

• n = 4
• n = 5
• n = 8
• n = 12

100 - x = 70

• x = 100
• x = 70
• x = 30
• x = 40

65 = 40 + c

• c = 40
• c = 20
• c = 65
• c = 25

120 = b - 80

• b = 40
• b = 200
• b = 120
• b = 60

17 + b = 20

• b = 3
• b = 17
• b = 20
• b = 37

29 = 21 + x

• x = 29
• x = 21
• x = 50
• x = 8

13 + q = 24

• q = 13
• q = 24
• q = 11
• q = 37

87 = 100 - x

• x = 13
• x = 87
• x = 187
• x = 100