2016-04-07 12:04发布
(7-x)/4-(x-1)/3=x+1
3(7-x)-4(x-1)=12(x+1)
21-3x-4x+4=12x+12
12x+3x+4x=21+4-12
19x=13
x=13/19
最多设置5个标签!
{var%20f='http://v.t.sina.com.cn/share/share.php?appkey=1515056452',u=z||d.location,p=['&url=',e(u),'&title=',e(t||d.title),'&source=',e(r),'&sourceUrl=',e(l),'&content=',c||'gb2312','&pic=',e(p||'')].join('');function%20a(){if(!window.open([f,p].join(''),'mb',['toolbar=0,status=0,resizable=1,width=440,height=430,left=',(s.width-440)/2,',top=',(s.height-430)/2].join('')))u.href=[f,p].join('');};if(/Firefox/.test(navigator.userAgent))setTimeout(a,0);else%20a();})(screen,document,encodeURIComponent,'','','https://wenda.whatsns.com/data/attach/logo/logo.png', '推荐 黑白红小子 的问题《(7-x/4)-(x-1/3)=x+1》','https://wenda.whatsns.com/q-231930.html','页面编码gb2312|utf-8默认gb2312'));){kind=link}
(7-x)/4-(x-1)/3=x+1
3(7-x)-4(x-1)=12(x+1)
21-3x-4x+4=12x+12
12x+3x+4x=21+4-12
19x=13
x=13/19
一周热门 更多>