Algebra practice question

Answer: 8

From the second equation x = 17 − 4y. Substitute: 2(17 − 4y) + 3y = 19, so 34 − 5y = 19 and y = 3. Then x = 5, and x + y = 8.

Common wrong answers

If you answered 3

3 is y alone.

If you answered 5

5 is x alone.

If you answered 15

15 is xy, the product.

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