Ok so this is the equation and how it is rearranged
$\displaystyle I = S + ( T - G ) $
$\displaystyle =[-C_0 + ( 1 - C ) ( Y - T ) ] + T - G $
$\displaystyle Y = \frac {1}{1-C_1} ( C_0 + I + G - C_1T) $
Ok so I am confused about why this occurs $\displaystyle C_1T $
Why multiply the marginal propensity to consume by tax? Can some one explain to me how these steps are thought out , my equation rearranging is not the sharpest.