If twice a certain integer is subtracted from 5 times the integer, the result is 63. Find the integer.

  • A 21
  • B 9
  • C 7
  • D 4
  • E 3
waec 1989mathematics

The correct answer is A. 21

Let the integer = y

\(\therefore\) 5y - 2y = 63

3y = 63 \(\implies\) y = 21

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