If a student loses 6 kilograms, he will weigh twice as much as his sister. Together they now weigh 126 kilograms. What is the student's present weight in kilograms?	Choose the correct answer:
A) 82 B) 84 C) 86 D) 88 E) 90
Let x be the weight of the sister.   Then the student's weight is 2x+6.   x + (2x+6) = 126   3x = 120   x = 40 kg   Then the student's weight is 86 kg.   The answer is 86.
<result>C</result>
If a student loses 6 kilograms, he will weigh twice as much as his sister. Together they now weigh 126 kilograms. What is the student's present weight in kilograms?