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7th grade help me plzzz

7th grade help me plzzz-example-1
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User DaSilva
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8 + 2n

sum means your adding. so, that means is one of the ones with addition. and since it says twice a number, the only option with addition and twice a number would be 8 + 2n because 2n is the same thing as 2 x n
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User Jack Dalton
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