Question 964060
Let s = the rate of the student in papers/hour
Let f = the rate of the friend in papers/hour
s*3  = 1 paper
divide each side by 3
s = 1/3 paper per hour
f*2 = 1 paper
divide each side by 2
f = 1/2 paper per hour

Let t = the time to complete the paper
s*t + f*t = 1 paper
(1/3)t + (1/2)t = 1 paper
multiply each side by 6
 2t + 3t = 6
 5t = 6
divide by 5
 t = 6/5 hours