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CTET PAPER II 2019 · PYQ · Algebraic Expressions · easy

What should be subtracted from 5y – 13x – 8a to obtain 11x – 16y + 7a?

  1. A.6x + 21y + 15a
  2. B.21y – 5x – a
  3. C.21y – 24x – 15a✓ Correct
  4. D.24x – 21y + a

Explanation

To find what to subtract: (5y - 13x - 8a) - (?) = (11x - 16y + 7a). So ? = (5y - 13x - 8a) - (11x - 16y + 7a) = 5y - 13x - 8a - 11x + 16y - 7a = 21y - 24x - 15a.
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