Question

o valor de x no sistema ?
x+y-3z=1
2x+y=6.
x+z=3

Answer 1

2x+y=6
- x-y+3z=1
________
x +3z=7

-x-z=-3
x+3z=7
______
2z=4
z=4/2
z=2

x+3z=7
x+3.2=7
x+6=7
x=7-6
x=1