Solve the equation .
Madison likes to do puzzles. It takes her a quarter of an hour longer to solve a hanjie than a sudoku.
Over one weekend, she spent hours solving puzzles. She solved 3 sudokus and 6 hanjies.
Write an equation that can be used to find , the amount of time it takes her to solve a hanjie puzzle.
Solve your equation to find how long it takes Madison to do a hanjie puzzle.