Respuesta:
5 x - 3y + 8y -3X+5 (2x-3y) = 5+32 +4 (3-2)
5 x - 3y + 8y -3X+ 10x-15y = 5+32 +4 +1
8y -3X+ 15x-18y =42
12x -10y=42