2247 divided by 7. I really don't know the answer. I have to show the work but don't know how to solve the problem

Write a story that matches with the expression 42x-5 pls hurry

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

How is working backward similar to solving an equation?