Two rafts are traveling in opposite directions on a straight river. the raft going with the current is traveling at a speed of 12 mph. the raft going against the current is traveling at a speed of 70 miles per hour. both rafts travel the river for two hours. which equation represents the situation? assume the raft traveling with the current travels x miles in the raft traveling against the current travels y miles. a. 12/x - 7/y = 1/2 b. 12x + 7y = 2 c. x/12 - y/7 = 2 d. x/12 + y/7 = 4 e. 12x + 7y = 4