The photocopying rates of two machines W and X are as shown. Both machines were use to make a copy of a set of notes which had been divided into teacher set and student set. Machine W took 7 minutes is to photocopy teacher set and Machine X took 10 minutes to photocopy student set.
- How many pages were there altogether in the set of notes?
- Another copy of the same set of notes was made using Machine X only. How many minutes did Machine X take?