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What is the value of x in $54321 + 489 + 699 = 489 + 54321 + x$ ?

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699

241

125

698

answer is A.

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Detailed Solution

Given expression is

54321 + 489 + 699 = 489 + 54321 + x

.
Using the associativity under the addition property, we get

a + (b + c) = b + (a + c)

On comparing the given expression with the above expression, we get

a = 54321, b = 489, c = 699

So, we get,

54321 + 489 + 699 = 489 + 54321 + 699

On comparison with the given expression, we get

489 + 54321 + 699 = 489 + 54321 + x ⇒ x = 699

Thus, the value of x is 699.
Therefore, the correct option is 699.

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