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1

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2

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10

Answer

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12

Answer

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Answer

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Answer

4 + 3 = 0

= 1

x + 2 =

x = -2

x = -3, -1

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17

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18

Answer

9 - 16 = 0

= 25

x + 3 =

x = -3

x = 2, -8

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19

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20

Answer

81 + 81 = 0

= 0

x + 9 = 0

x = - 9

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Answer

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Answer

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25

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26

Answer

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28 of 28

28

Answer