-1 because -3x+1=2 (4 total spaces) so, 2+1 is 3 you have life numbers and x values separate. divide positive 3 by negative 3 to get -1. check your answer by plugging it in -1*-3 is 3 so - 3+1 world be 4 which is where the 2 is on the number line because it goes into negatives