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When one end of a seesaw is 9 inches above the ground and the other one is 21 inches above the ground how far are the ends above the ground when the seesaw is level

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Respuesta :

Answer:

15

Count down from 21 and count up from 9 till you have the same number.

21 9

20 10

19 11

18 12

17 13

16 14

15 15

Now they are the same height.

Step-by-step explanation:

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