Advanced Math practice question

Answer: 7/3

In base 2: x + 2(x + 1) = 9, so 3x + 2 = 9 and x = 7/3.

Common wrong answers

If you answered 2

4ˣ⁺¹ contributes 2(x + 1), not (x + 1); the equation is 3x + 2 = 9.

If you answered 3

3 is the exponent on 8; convert everything to base 2 first.

If you answered 7

7 is 3x; divide by 3.

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