Advanced Math practice question

Answer: 22/3 or 7.33 or 7.333

Either 2x − 5 = x + 1, giving x = 6, or 2x − 5 = −(x + 1), giving x = 4/3. The sum is 6 + 4/3 = 22/3.

Common wrong answers

If you answered 4

4 comes from 2x − 5 = −x + 1 with a slip, giving x = 2, plus a wrong second root.

If you answered 6

6 is one solution alone.

If you answered 14/3

14/3 subtracts the roots instead of adding.

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