Algebra practice question

Answer: 6

From the second equation, y = x − 2. Substitute: x/2 + x − 2 = 7, so (3/2)x = 9 and x = 6. Check: 3 + 4 = 7 and 6 − 4 = 2.

Common wrong answers

If you answered 3

3 is x/2, half of x.

If you answered 4

4 is y. The question asks for x.

If you answered 9

9 is (3/2)x, one step short; multiply by 2/3.

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