PLZ HELP, FIND ANSWERS TO #5 and #6

Solve for x, y, and z. show all steps.

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?