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410 is the answer :)

10
No one says that the other four equations are correct.

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A=(a-b)
B=(a+b)
A(a=7)B(b=3) => 410

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@honolulu

410
7-3 = 4
7+3=10
4 first 10 last

410 is the correct answer

  1. Upvoted and resteemed. Already followed.

410

410 , upvoted