Y = E = C + I + G
Y = ( a + I* + G* ) + cYd
Y - cYd = ( a + I* + G* )
Y - c( Y - T ) = ( a + I* + G* )
Y - cY + cT = ( a + I* + G* )
Y - cY + c(T* + tY ) = ( a + I* + G* )
Y - cY + cT* + ctY = ( a + I* + G* )
Y - cY + ctY = ( a + I* + G* ) - cT*
Y ( 1 - c + ct ) = ( a + I* + G* ) - cT*
Y = ( a + I* + G* - cT* ) / ( 1 - c + ct )