AlgebraMediumEquation from a two-part description
Algebra practice question
Twice the quantity 'one more than three times a number', added to the number itself, equals 37. What is the number?
Answer: 5
2(3n + 1) + n = 37, so 7n + 2 = 37, 7n = 35, n = 5.
Common wrong answers
- If you answered 6
- 6 comes from 6n + 1 = 37 (not distributing the 2 to the 1 and dropping the extra n).
- If you answered 7
- 7 comes from 5n = 35, dropping the n that is added outside the bracket.
- If you answered 35
- 35 is 7n, not n.
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