380+420+460+500=( )*( )=( )

380+420+460+500=( )x( )=( ) 380+420+460+500=( )*( )=( ) mathematica线性规划问题,其约束条件变量值二取一,如何实现?a = {{0,500,1000,300,400,1500},{1500,0,250,630,360,1140},{400,510,0,460,320,490},{300,600,810,0,820,310},{400,100,420,730,0,970},{350,1020,260,580,380,0}};d = {{0,945,605,46 解方程20%X+420=0.75X-380 40%x+420=3分之2x-380 380和420的最小公倍数 1/2+1/6+1/12+1/20+1/30+.1/380+1/420= 百分之四十X+420=三分之二X-380 问X怎么求? lingo问题,谁帮我运行下这个程序,有错误的话帮我看看model:sets:xcs/1..20/:A,m,n,q;ccs/1..2/:x;link(xcs,ccs):c,b;endsetsdata:A=300,320,340,360,380,400,440,460,500,540,480,440,380,340,280,200,160,80,60,40;m=16,16,16,16,16,16,16,16,16, =380 格列佛游记的读后感,460~500字左右. 500uµV=___V=____kV,380V=____kV=_____µV 420减58= matlab 极坐标曲线拟合方程怎么求?θ=[0,15,30,45,60,75,90,105,120,135,150,165,180,195,210,225,240,255,270,285,300,315,330,345,360]; θ的值的单位为度R=[320,321,341,375,420,450,460,466,474,468,466,466,466,466,466,466,466,461,443,420,40 解方程 x+130%x=460 解方程：x+130%x=460 380V 三相电 单相对地是220V 460V 三相电 单项对地是多少V啊 460V三相电 怎么取220 09年6月六级多少分过考了442,据说是420到460之间浮动,到底是怎么样?