Question: 3 + 4 = 7 5 - 1 = 2 21 + 2 = 24 x - 5 = 12 9 - x = x

3 + 4 = 7

5 - 1 = 2

21 + 2 = 24

x - 5 = 12

9 - x = x

13 + 2 = 15

Cules ecuaciones son ciertas?

Cules ecuaciones son falsas?

Cules ecuaciones no son ni ciertas ni falsas?

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