x+(126-x)=126zhen me suan

x+(126-x)=126zhen me suan di zhen le zen me zuo 已知反比例函数y=(2m-1)x^ m^2 -2,在每个象限内,y随x的zhen大ar减小,求反比例函数的解析式有些字不会拼 zhen mei yi si gan dian shen me hao ne? wei shen me wei shen me jin nian tian zai zhen me dou ne? x-x/7=126 x=? lingo选址问题,请问哪里错了model:sets:cun/1..12/:a;!村子;zhen/1..4/:b;!镇子;Routes(cun,zhen):c,x;!分配量矩阵;endsetsdata:a=2.6,2.4,2,1.8,3.2,4.6,3.4,2.3,3.2,1.4,3.2,1.8;!计划粮食;c=13,7,9,15,8,12,9,10,3,15,8,5,16,7,3,13,8,7,11,2 已知x+1/x=3(x>0)求x的三分之二次方+x的负三分之二次方help me! ji suan ji mei le zuo mian shi zhen me hui shi zhao yi ge zhen zheng ai ren zhe me nan le zhen zhuo 3.14x=126,x=? 3x+5(30-x)=126 X^2+3X-126=0 (20-2x)(8-x)=126 (3.5x +x)×2=126 5x=3x+126 2x+(x+15)*4=126