Algebra practice question

Answer: 3

Substitute: 2k + 3(k + 1) = 18 → 5k + 3 = 18 → k = 3. The point is (3, 4).

Common wrong answers

If you answered 4

4 is k + 1, the y-coordinate.

If you answered 15

15 is 5k, before dividing by 5.

If you answered 3.6

3.6 comes from 5k = 18, forgetting the +3.

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