Francis earns $3.50 an hour mowing lawns. He also gets a $10.00 a week allowance. Bella earns $5.25 an hour babysitting and spends $11.00 a week on books. If Francis and Bella work the same number of hours a week and have the same amount of money at the end of each week, for how many hours a week and have the same amount of money at the end of each week, for how many hours a week do they each work?

Write an equation, solve, and check.