x-2y=9 x-z=3 2z+x=47
2个回答
x-2y=9
x=2y+9
x-z=3
z=x-3=(2y+9)-3=2y+6
代入2z+x=47
4y+12+2y+9=47
6y=26
y=13/3
x=2y+9=53/3
z=2y+6=44/3
相关问题
(1)x-2y=-9,y-z=3,2z+x=47.
解方程组x-2y=-9 y-z=3 2z+x=47
解三元一次方程组,方程组1:方程组2:X-2Y=-9 3X-Y+Z=4Y-Z=3 2X+3Y-Z=122Z+X=47;
已知x+2y+3z=54,3x+2y+2z=47,2x+y+z=31,求代数式x+y+z的值
x+y+z=15 2x+3y+4z=47 3x+4y+5z=62
x+y+z=15 2x+3y+4z=47 3x+4y+5z=62
x-2y+z=9 3x+2y-2z=4 2x-z=9
已知x+2y+3z=54,3x+y+2z=47,2x+3y+z=31,那么代数式x+y+z的值是( )
已知x+2y+3z=54,3x+y+2z=47,2x+3y+z=31,那么代数式x+y+z的值是( )
{2x-y+3z=21 x+2y-z=3 3x+2y-2z=9}