Question

x+y+z=6
×-y+2z=5
×-y-3z=10​

Answer 1

Respuesta:

x+y+z=6 x-y+2z=5 x-y-3z=10

3x=6 x-y+z=5-2 x-y-z=10+3

x=6:3 x-y+z=3 x-y-z=13

x=3 x=3 -x=13 ---> x= -13