Question 205558
(E n )/9 =40
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{E (n(1) +1) + n(2) +2 +.........  } / 9 = ?
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 (E n)/9 + { 1+2+3+4+5+6+7+8+9 } /9 = ?
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(En)/9 + { 45/9} = ?
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40 +5 = ?
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45 = ?