{x:y:z=3:4:5 {x+2y+z=48 怎么解
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{x:y:z=3:4:5 {x+2y+z=48 怎么解
![{x:y:z=3:4:5 {x+2y+z=48 怎么解](/uploads/image/z/19401993-9-3.jpg?t=%7Bx%3Ay%3Az%3D3%3A4%3A5+%7Bx%2B2y%2Bz%3D48+%E6%80%8E%E4%B9%88%E8%A7%A3)
设X=3T 因为X:Y:Z=3:4:5 所以Y=4T,Z=5T 将X=3T,Y=4T,Z=5T代入X+2Y+Z=48 所以3T+8T+5T=48 16T=48 所以T=3 所以X=3T=9 Y=4T=12、 Z=5T=15
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
2x+4y+3z=9 3x-2y+5z=11 5x-6y+7z=13 这个方程怎么解?
x/2=y/3=z/5 x+3y-z/x-3y+z
解方程一;{x+y-z=6,x-3y+2z=1,3x+2y-z=-7.②{3x+4z=7,2x+3y+z=9,5x-9y
3元一次方程怎么解 如 2x+y+3z=23 x+4y+5z=36
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
解方程组{z=x+y 3x-2y-2z=-5 2x+y-z=3
解方程组 z=x+y 2x-3y+2z=5 x+2y-z=3
解方程:{2x+3y+z=7,x+y+z=4,3x+y-z=-4
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}
解方程{3x -y+z=4 2x+3y-z=12 x+y+z=6