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Answer
The unknown value is 61.86.
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Bonus Knowledge
To solve for the unknown value, we can isolate the square by adding 20.8 to both sides of the equation. So,
. When we perform the addition, we find that
. It’s like a little math adventure where you uncover the mystery of the missing number!
Remember, when dealing with equations, it’s all about keeping the equation balanced. Always perform the same operation on both sides to find your unknown. This tip will prevent you from making common mistakes and help you reach the correct answer every time!