If a student loses 5 kilograms, he will weigh twice as much as his sister. Together they now weigh 104 kilograms. What is the student's present weight in kilograms?
Options
A) 70
B) 71
C) 72
D) 73
E) 74
Let x be the weight of the sister.   Then the student's weight is 2x+5.   x + (2x+5) = 104   3x = 99   x = 33 kg   Then the student's weight is 71 kg.   The answer is 71.
<result>B</result>
If a student loses 5 kilograms, he will weigh twice as much as his sister. Together they now weigh 104 kilograms. What is the student's present weight in kilograms?