Please answer right I will give you brainliest :) 15 points!

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 do you solve a question like this?

The longer leg of a 30-60-90 trangle is 18