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 January 28th, 2017, 11:43 AM #1 Newbie   Joined: Jan 2017 From: Britain Posts: 18 Thanks: 0 Macro economics equation Having some basic problems with economic equations: Y =0.5Y + 200 +I becomes: Y = (200+I)/0.5 Can anyone show me the steps to get from the first to the second? many thanks, Simon
 January 28th, 2017, 12:13 PM #2 Math Team     Joined: Jul 2011 From: Texas Posts: 3,044 Thanks: 1627 $y = 0.5y + 200 + I$ $y - 0.5y = 200 + I$ $y(1-0.5) = 200+I$ $y(0.5) = 200+I$ $y = \dfrac{200+I}{0.5} = 2(200+I)$
 January 28th, 2017, 12:50 PM #3 Newbie   Joined: Jan 2017 From: Britain Posts: 18 Thanks: 0 Thanks! many thanks for the help -I always seem to fall down on the fact that : Y - 0.5Y can be factored into y(1-0.5) . The last equation I posted which you kindly solved for me had the same conceptual step. Maybe it will sink in one day

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