Advanced Math practice question

Answer: 11

3x + 6y = 3(x + 2y) = 15, so 3x + 6y − 4 = 11.

Common wrong answers

If you answered 1

1 comes from 5 − 4, forgetting to multiply by 3.

If you answered 15

15 forgets to subtract 4.

If you answered 19

19 adds 4 instead of subtracting.

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