Algebra practice question

Answer: 6

12 + y = 3(12 − y) gives 12 + y = 36 − 3y, so 4y = 24 and y = 6.

Common wrong answers

If you answered 3

3 halves 6.

If you answered 4

4 is 12 ÷ 3.

If you answered 9

9 comes from 12 + y = 3(12) − y.

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