Question

1) -x -4x=0
3x+2y=5

2) x+z+y+z=1
2x-z+y=2
-x+z-y-t=0
2x+2x+t=-1

3) 2x-z+y=1
2x+ 3y=-1
3x+y-2z=7

4) -1x+4=0
3x+1y=4

Answer 1

Resposta:

responda 55 +50 -5+ 1 negao =