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Question

There are two numbers. If 2490 is subtracted from one number then we get the other number. The algebraic expression depicting this information is:


  1. a + b = 2490

  2. a - b = 2490

  3. a + b + 2490 = 0

  4. a  – b + 2490 = 0


Solution

The correct option is B

a - b = 2490


Let the two numbers be a and b.

If 2490 is subtracted from the number, we get (a - 2490)

If 2490 is subtracted from a number we get the other number:
  (a – 2490) = b 
  (a – b) = 2490

The variables can be any two alphabets. It need not necessarily be x and y or a  and b.
The algebraic expression depicting this information is (a – b) = 2490

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