Algebra practice question

Answer: 4

Substitute (a, 2a): 3a + 8a = 44, so 11a = 44 and a = 4.

Common wrong answers

If you answered 8

8a is just the y-term's contribution; the full equation is 11a = 44.

If you answered 11

11 is the combined coefficient (3 + 8); divide 44 by it to get a = 4.

If you answered 6.28

Set up 3a + 4(2a) = 44 — the y-coordinate is 2a, so the y-term is 8a.

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