\"\"

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The equation is \"\".

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What number minus 8 equals to 20?      (Write the equation as a question)

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The solution is 28.\"\"

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Check whether 28 is a solution.

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\"\"                       (Write the equation)

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\"\"                     (Substitute \"\")

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\"\"                           (Subtract: \"\")

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\"\" is the solution of the equation.\"\"

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\"\" is the solution of the equation.