I know the answer to my problem but I don't know how to get it.... Please look and help. If B is between A and C, AB =4x-9,BC=7-x, and AC=2x+3, find the valuse of x and the measure of line AC..... This is my 2nd week in this class and I can't do any of the problems.... I feel lost and our teacher just makes us take notes.... how can i keep up?