Mrs. Cook and Mrs. Jones were both grading papers at a coffee shop, they then finish at home. Mrs. Cook graded 10 papers at the coffee shop and now grades 3 papers an hour at home. Mrs Jones graded 4 papers at the coffeee shop and now grades 5 papers an hour at home. In how many hours would the teachers be done grading the same amount of papers? write and solve a system of equations. Show your steps