0.9669x+0.9264y=1400...①x+y=1505............②2式×0.9669即为0.9669x+0.9669y=1505×0.9669=1455.1845....③①-③得 0.9264y-0.9669y=-0.0405y=1400-1455.1845=-55.1845即y=-55.1845/-0.0405=1362.580247倒入即可解得x
