Решите систему 1/x+1/1=7/1 1/x-1/y=1/12
1/x + 1 = 7 1/x - 1/y = 1/12 6x = 1 y - x = 1/12xy 1/6 - y = 1/72y 73/72y = 1/6 y = 12/73 x = 1/6