Can anyone get me started on this?

A country has 2 regions, the North and South, which are identical in all respects except for the hourly wage and number of workers. The demand for labor in the region is Wn=$20 - .5En and Ws=$20 - .5Es where En and Es are millions of workers. Currently there are 6 million workers in the North and 18 million workers in the South. What is the wage in each region?

see my response to your later post.