Question 164829
If S is the selling price needed to at least cover the loan and broker fee then we can write the equation in this way.  S-.1(S)>=11025  solving for S we get .9S>=11025 
S>=$12250 ... so John needs to sell this vehicle for at least $12250 in order to pay the broker fee and the loan on the car.  Any thing above this price is his to keep.