Solve the first two-dimensional linear equation and solve the application problem.

1, assuming that among 580 officials, the number of corrupt health officials accounts for X, and the number of incorruptible health officials accounts for Y..

580x-600y=272

580x+600y=444

The solution is x=6 1.72%.

y= 14.33%

2. The average daily passenger traffic of ground bus is X million passengers, and that of rail transit is Y million passengers.

x+y= 1696

x=4y-69

The solution is y=353.

x= 1343