1,2,3,4,5,
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1,2,3,4,5,1,2,3,4,5, 1,2,3,4,5,1152（-wuqiong,11]3(2,16)cm4-23/45606x=(12+6y)/50y=(5x-12)/6-2
1,2,3,4,5,
1,2,3,4,5,
1,2,3,4,5,
1 15
2 （-wuqiong,11]
3 (2,16)cm
4 -23/4
5 60
6 x=(12+6y)/5 0
y=(5x-12)/6 -2