设直线是x/a+y/b=1
则面积=|ab|/2=48
ab=±96
6/a+3/b=1
3a+6b=ab=±96
a=32-2b,ab=96或a=-32-2b,ab=-96
所以b=4,a=24
b=12,a=8
b=8-4√7,a=-48+8√7
b=8+4√7,a=-48-8√7
代入bx+ay-ab=0即可