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What is the solution for x + 9 = 21

• 10
• 12
• 11
• 13

x - 8 = -5 

• 13
• -13
• 3
• -3

m+13=21

• m=34
• m=8
• m=273
• m=6

7 + g = 11

• g = 4

• g = -4

• g = 18

• g = -18

• 3

• 4

• 8

• 12

• 14

• -14

• -5

• 5

What is the inverse of addition?

• subtraction

• multiplication

• division

• addition

What is the inverse of multiplication?

• multiplication

• addition

• division

• subtraction

• x = 20
• x = 7
• x = 10
• x = 3

4x = 72

• x = 18

• x = 68

• x = 288

• x = 62