\"Addition

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The equation is  \"\"

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\"\"           (Add 25 to each side)

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k + 0 = 30 + 25                    (Apply Additive inverse property:25 25 = 0)

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k = 55                                   (Add:  30+25= 55)

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Check:

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To check the solution, substitute k= 55 in original equation.

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30 = 30                               (Subtract: 55-25  = 30)

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The statement is true.

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The value of k = 55.