Let f(x)=(2x+2)/(-1x+3) . Then f(x)=.3 when x =

(2x+2)/(-1x+3)  = .3       multiply both sides by (-1x + 3)

2x + 2  =  .3(-1x + 3)      simplify

2x + 2  = -.3x + .9       subtract 2 from both sides.....add .3x to both sides

2.3x   =  -1.1      divide both sides by 2.3

x = -1.1 / 2.3   = -11/23