Advanced Math practice question

Answer: 40

6x + 10 = 2(3x + 5) = 2 × 20 = 40. (Or solve: x = 5, so 30 + 10 = 40.)

Common wrong answers

If you answered 5

5 is x itself, not 6x + 10.

If you answered 20

20 is the value of 3x + 5, not of its double.

If you answered 30

30 is 6x without the +10.

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