Algebra practice question

Answer: 2

Subtracting the second equation from the first gives 4x = 20, so x = 5; then 2y = 6 and y = 3; x − y = 2.

Common wrong answers

If you answered 5

5 is x alone.

If you answered 8

8 is x + y.

If you answered -2

−2 subtracts the wrong way.

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