X:Y:Z=5:7:6 ﹛ 20X+10Y+5Z=48000
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X:Y:Z=5:7:6 ﹛ 20X+10Y+5Z=48000
已知4x-3y-6z=0,x+2y-7z=0,求5x+2y-z/2x-3y-10z
请高手帮我解几道3元1次的方程组!好的100分,x+2y+3z=15x-y+7z=20x+3y+2z=14x+y-z=3y+z-x=5z+x-y=7x+y-z=0.5x-3y+2z=03x+2y-z=23x-2y=12y+3z=2x+5z=315x-3y+2z=13x+4y-z=-18z=136x-y-z=32x-4y+8z=53x-6y-z=10x+y=3y+z=5x+z=6
帮忙解这几道三元一次方程组(1)X-Y+Z=22X-3Y-Z=-7Z=3(2)X+Y+Z=6X-2Z=12X-2Y+Z=3(3)X+Y=8Y+Z=6Z+X=4(4)X-Y=3Y-Z=4X+Z=5(5)2X+3Y-Z=102X+Y-5Z=8-2X+7Y+Z=20(6)2X+Y+Z=3X+2Y+Z=4X+Y+2Z=5(7)X:Y=2:1X+Y+Z=23X+2Y-2Z=10第一天上课没听懂明天上课绝
x:y=5:7 y:z=7:6 20x+10y+5z=48000 怎么解
问几道数学题0三元一次方程的1.【3x-5y+2z=1 4x+5-z=5 x-5y+3z=-22.【6x+7y+4z=20 3x+4y+2z=10 2x+6y+7z=183.【2x+3y-4z+-2 3x-2y+5z=26 2x+5z=31
x+y+z=16 5x+6y+7z=10
接下列方程组 1.x+y=7,y+z=8,x+z=9,2.5x+y+z=6,x+5y+z=-2,x+y+5z=10
{20x+10y=z,5x+6y=1/3z,2x-3y=1
三元一次方程组 6道 -数学老师疯了- - 20道 剩下几道实在懒得想了 帮帮做下哈 (x-2y=-9 y-8=3 2z+x=47) (3x+2y+z=14 y+z+x=10 z+2x+3y=15)(y=2x-7 5x+3y+2z=2 3x-4z=4) (3x-y+z=3 2x+y-3z=11 x+y+z=12) (5x-4y+4z=13 2
若X:Y:Z=5:6:7那么(Y-X):(Y+Z)和(X+2Y+3Z):(3X+2Y+Z)
解方程组:{x(x+y+z)=6 {y(x+y+z)=9 {z(x+y+z)=10
x+y-z=3 y+z-x=5 z+x-y=7 求x,y,z
紧急..x+y+z=20x+2y+1.5z=367x+10y+6z=100
x+y-z=5,2x+3y+z=10,x-2y-z=20求方程组
x+y-z=5 2x+3y+z=10 x-2y-z=20 速解,
若3x+7y+z=5,4x+10y+z=3,则x+y+z=?
x/10=y/5=z/7 x+y+2z=29 求x y z