If a student loses 5 kilograms, he will weigh twice as much as his sister. Together they now weigh 116 kilograms. What is the student's present weight in kilograms? Answers:
A) 76
B) 77
C) 78
D) 79
E) 80
Let x be the weight of the sister.   Then the student's weight is 2x+5.   x + (2x+5) = 116   3x = 111   x = 37 kg   Then the student's weight is 79 kg.   The answer is 79.
<result>D</result>
If a student loses 5 kilograms, he will weigh twice as much as his sister. Together they now weigh 116 kilograms. What is the student's present weight in kilograms?