△十△二口+口+口,口十口+口二O十O+O+O,△+口十O二1600整理如下:2△=3口3口=4O△+口+O=1600解:△=1.5口O=3口/4△+口+O=1.5口+口+3口/41.5口+口+3口/4=16006口+4口+3口=640013口=6400口=6400/13△=9600/13O=4800/13