Question

Resolva:
A) x +2y =5
2x - 3y=-4

B) 3x-4y =1
x+3y=9

C) x-y-z=2
2x+y+2=1
3x-2y=5

D) x+y-3z = 1
2x+y =6
x+z =3

E) x+y+z= -2
2x-y+z= 3
x+4y-z =6

F) x+2y-3z =9
3x-y+4z= - 5
2x+y+z= 0

G) x-y+2z= -2
3x - 2y +4z = -5
y - 3z = 2

Answer 1

A) 2×+x+2y+3Y=
3x+5y=5+4
8y=9
X=9\8
X=72