Algebra practice question

Answer: 9

Distribute: 5x − 10 − 3x = 8, so 2x − 10 = 8, 2x = 18, x = 9.

Common wrong answers

If you answered 1

1 comes from 5x − 2 − 3x = 8 (forgetting to multiply the 2 by 5).

If you answered 5

5 comes from 2x = 10, subtracting 10 from 8 on the wrong side.

If you answered -1

−1 comes from a sign slip: 2x + 10 = 8.

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