Solve for the roots in the following equation - not sure how to do this correctly.

What could explain what happened when the time was equal to 120 minutes

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?

Just tell me how to set up the equation.