Algebra practice question

Answer: 22

3(2x + 1) − 5 = 22 gives 6x + 3 − 5 = 22, 6x = 24, x = 4. Then 4x + 6 = 22. (Shortcut: 6x − 2 = 22 means 6x = 24, and 4x + 6 = (2/3)(6x) + 6 = 16 + 6.)

Common wrong answers

If you answered 4

4 is x itself; the question asks for 4x + 6.

If you answered 16

16 is 4x without the +6.

If you answered 30

30 comes from x = 6 (solving 6x = 36 after adding 5 twice).

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