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CA Foundation · Quantitative Aptitude · Equations

The equation (2x + 1)/(x − 3) = 3 has what solution?

The solution is x = 10. Cross-multiplying gives 2x + 1 = 3x − 9, so x = 10. Substituting gives 21/7 = 3, confirming it.

  1. Ax = 10Correct
  2. Bx = 8
  3. Cx = 3
  4. Dx = −10

Explanation

Cross-multiply: 2x + 1 = 3(x − 3) = 3x − 9. Then 10 = x. Check: (21)/(7) = 3. Option x = 3 makes the denominator zero and is invalid.

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