Advanced Math practice question

Answer: 9

Square both sides: 2x + 7 = 25, so 2x = 18 and x = 9.

Common wrong answers

If you answered 16

Subtract 7 from 25 before dividing: 2x = 18.

If you answered 18

18 is 2x; halve it.

If you answered 25

25 is 2x + 7 after squaring; keep solving for x = 9.

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