Sagot :
3x+2+2x-4-5x=-2
-5-4x+5y-2y+6x=3y+2x-5
5z-4x-3y+5+4x+6y-z=4z+3y+5
12z-4-5x+z+3z+y-5w=16z-5x+y-5w-4
3X + 2 + 2X - 4 - 5X = X - 2
-5 - 4X + 5Y - 2Y + 6X = 2X + 3Y - 5
5Z - 4X - 3Y + 5 + 4X + 6Y - Z = 3Y + 4Z + 5
12Z - 4 - 5X + 1Z + 3Z + Y - 5W = -5W -5X + Y + 16Z -4