Question 1202418
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Another wrong answer from tutor @mananth, who provides responses without checking to see if her answers are correct....<br>
(The freight train travels for 6 hours, but the express train only travel for 3 hours.)<br>
6(x)+3(x+20) = 420
6x+3x+60 = 420
9x = 360
x = 40<br>
ANSWERS:
freight train: x = 40 mph
express train: x+20 = 60 mph<br>
CHECK: 6(40)+3(60) = 240+180 = 420<br>