------------------------------------------------------------------------------------------------ х х1 = х * 4 х1 - х = ?------------------------------------------------------------------------------------------------ 7 28 28 - 7 = (на) 21------------------------------------------------------------------------------------------------ 5 20 20 - 5 = (на) 15------------------------------------------------------------------------------------------------ 9 36 36 - 9 = (на) 27------------------------------------------------------------------------------------------------ 11 44 44 - 11 = (на) 33------------------------------------------------------------------------------------------------