Question

6425+(529+471)=(6425+?)+471​

Answer 1

Answer:

529 is the anwer because there the word was not there.

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Answer 2

Answer: 529

let, the unknown number is a

now, 6425+( 529+ 471) = (6425+ a)+ 471

 ⇒    6425+ 529+ 471= 6425+a + 471

 ⇒ 7425= 6896+ a

 ⇒ a= 7425-6896

 ∴ a= 529