1/2x+3(-2z+y)-(1/3x-4y-5z)
1个回答
先去括号再合并同类项
结果为1/6x+7y-z
相关问题
x-5y-3z=0 y+z-3x=3 x+y+3z=14 y+4z=3 z+x-3y=5 2x+y+z=7 2x-z=1
3x-5y+2z=1 4x+5y-z=5 x-5y+3z=-2
解三元一次方程组1)2x+y-3z=3,3x-y+2z=1,x-y-z=5 2)x:y=3:2,y:z=5:4,x+y+
3x+2y+z=9 x-3y-2z=1 -x+4y+4z=5
解三元一次方程组1、x+y-z=4 2x-y+z=5 x-3y+z=-2 2、y+2z=-2 3x+y-4z=1 2x-
2x-y=7 x+y+z=25x+3y+z=2 x-2y+z=-1 3x-4z=4 x+2y+3z=-1x+y-z=6x
2x-3y+2z=1(x-1)/3=(y-3)/4=(z+2)/5
一1 .x+z-3=02 .2x-y+2z=23 x-y-z= -3二1.2x+4y+3z=92 3x-2y=5z=11
3元1次方程组 x+y-z=4 (1) 2x-y=5-z(2) x-3y+z=-2 (3)