Ответ:\(800-(145+x)=378\).\(145+x=800-378=422\).\(x=422-145=277\).\(x+320-130=470\).\(x+190=470\).\(x=280\).\(679+x=1000-277\).\(679+x=723\).\(x=44\).Ответ: 277; 280; 44.