Respostas

  • Usuário do Brainly
2014-08-23T00:03:52-03:00
2014-08-23T01:17:08-03:00
X-Y+1090-X+Z-Y+300-Z-Y-X = 800+450-Z-Y+578-Z+803-Z+Y+X-560

X-Y+1090-X+Z-X + 2Y +2 + 300 = 800+450-Z-Y+578-Z+X + Y - 243

X-Y+1090- 2X - 2Y + 300 = 800+450-Z-Y +X + Y -2 Z + 821

-X -3Y - 1390 = X - 3Z - 2071

-X - 3Y - 1390 - X .+ 3Z + 2071

-2X - 3Y - 3Z + 681 =0