Question

X+y- 2z = 9
2x-y +4z=4
2x-y +6z= -1
​

Answer 1

Respuesta:

X+y- 2z = 9

2x-y +4z=4

x-$\frac{1}{2}$ y +3z + 1/2

$\frac{1}{2}$ y + 3z 1/2+y -2z=9

2(1/2 y+3z+1/2)-y42=4

3y+2z=17

z=-$\frac{13}{2}$

3y+2 x (-$\frac{13}{2}$)=17

y=10

x=1/2x103x(-$\frac{13}{2}$)+1/2

x=-14

(x,y,z)=(-14,10,-$\frac{13}{2}$)

(-14)+10-2 x (-$\frac{13}{2}$)-(-1)

9=9

4=4

-28=-28

(x,y,z)= (-14,10,-$\frac{13}{2}$)

Explicación paso a paso: