Question

* RESOLVA OS SISTEMAS

2x+y+3=1
x-3y+2z= -1
3x+y-z= 4

Answer 1

A{2x+y+3=1 -> A{2x+y=-4
B{x-3y+2z=-1
C{3x+y-z=4

B{x-3y+2z=-1/
C{3x+y-z=4/.(2)

B{x-3y+2z=-1
C{6x+2y-2z=8
___________
Bc{7x-y=7
A{2x+y=-4
________
9x=3
x=3/9

x=1/3

A{2x+y=-4
A{2(1/3)+y=-4
A{2/3+y=-2
A{y=-4-2/3
A{y=(-12-2)/3

A{y=-14/3

C)3x+y-z=4

3(1/3)-14/3-z=4
1-14/3-z=4
-z=4-1+14/3
-z=3+14/3
Z=-3-14/3 achar o mmc

Z=-23/3

Espero ter ajudado!