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‘Ragnarok Online Ep5.0 πο Lv21 ‘
[186]('A`)Ι@ragnarok2F2008/09/26(ΰ) 11:38:21 ID:082Jy3+s
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6x+2y=50
x+y=15
x=-y+15
6(-y+15)+2y=50
-6y+90+2y=50
-4y=-40
y=10
x+10=15
x=5
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0ch BBS 2007-01-24