Hector owns science fiction novels, coming c books, and mystery novels. He has half as many science fiction novels as comic books and he has three times as many mystery novels as comic books. If he owns a totals of 54 books how many of those book are science friction novels?

Answer 1

X Comic books.
X/2 Science fiction.
3X Mystery novels.

X + X/2 + 3X = 54,
Multiply both sides by 2:
2X + X + 6X = 108,
9X = 108,
X = 12,
X/2 = 6 Science fictions novels.

Answer 2

One eight of Tony’s books are mystery books.he has 3 mystery books.how many dose he have in all

Answer 3

gh bought some magazines that cost $3.95 each and some books that cost $8.95 each. He spent a total of $47.65. If Hugh bought 3 magazines, how many books did he buy?

The equation that models the problem is 3.95m + 8.95b = 47.65, where m is the number of magazines and b is the number of books.