Question

Resolva o sistema escalonado
X+y +z+t=0
Y+z-t=1
5z-2t=5
2T=20

Answer 1

T=10

5z - 20= 5
5z=25

z=5

Y+5-10=1

Y=6

X+6+5+10=0

X= -21.

Answer 2

x= -21
y=6
z=5
t=10

2t=20/ t=10
5z-2t=5/= 5z-20/z=5
y+z-t=1/= y+5-10/y=6
x+y+z+t=0/= x+6+5+10/x=-21