MATH HOMEWORK HELP!! >> Solving systems by GRAPHING:

The science club needs to rent a bus for a field trip. main street buses charges a $40 rental fee, plus $2 per mile. county bus line charges a $20 rental fee, plus $3 per mile, for what number of miles will the total charge be the same? what will that charge be?

Please put the equation is slope intercept form and the solution (coordinates)