Algebra practice question

Answer: 3

Substitute y = 4: 2x + 4 = 10, so 2x = 6 and x = 3.

Common wrong answers

If you answered 2

Check: 2(2) + 4 = 8, not 10. The value is x = 3.

If you answered 6

6 is 2x; divide by 2 to get x = 3.

If you answered 7

Subtract 4 from 10 before dividing: 2x = 6, x = 3.

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