Solve for x 9-2x=35

answers
-2
48
-22
-13

This is so hard and it’s for a test

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?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827