\"\"

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The equation is \"\".

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According to addition property of equality: if a = b, then a + c = b + c.

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\"\"     (Add 3.5 to each side)

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\"\"                        (Apply additive inverse property: \"\")

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\"\"                              (Add: \"\")\"\"

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Check:

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To check the solution substitute \"\" in original equation.

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\"\"

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10 = 10                               (Subtract: \"\")

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The equality is true.\"\"

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The value of \"\".