Jarrod helped his teachers pack textbooks into boxes for the summer. He packed 7 boxes of science textbooks with 14 books per box. He also packed math textbooks with 12 books per box.

If x represents the total number of boxes he packed, which of the following equations can be used to find the total number of books that Jarrod packed into boxes?
A.
y = 98(x - 7) + 12
B.
y = 12(x - 7) + 98
C.
y = 12x + 98
D.
y = 98x + 12