SYDNEY, Aug 29 (Reuters) - Australia's debt-laden households can count on the first cut in interest rates in seven years next week, say economists, and likely a few more over coming months. A Reuters poll of 20 analysts found all but one expected the Reserve Bank of Australia (RBA) to trim its key cash rate 25 basis points to 7.0 percent at its monthly policy meeting on Sept. 2. 'The days of the inscrutable central banker are gone. The RBA has signalled an intention to cut interest rates,' said Michael Blythe, chief economist at Commonwealth Bank. 'We expect a 25 basis point cut as a first instalment in a rate cut ... (full story)