Algebra is number and letters together E.g 7x = 7 x X 3a + 4a = 7a Hope this helped , if you put the question on I am more than happy to help you answer it
If Jenni get one page closer to Wren every night and Wren has read 8 more pages then is will take Jenni 8 more nights to catch up to Wren. They will be on page 30 in their book.