In exercises 3-12, solve the literal equation for y.
(see example 1.)
3. y - 3x = 13
4. 2x + y = 7
6. 20x + 5y = 15
5. 2y – 18x = -26
7. 9x - y = 45
8. 6x – 3y = -6
9. 4x – 5 = 7 + 4y
10. 16x + 9 = 9y – 2x
12. 11 - y = 3 + 6x
11. 2+ y = 3x +4

Cam bought some used books for $4.95. he paid $0.50 each for some books and $0.35 each for the others. he bought fewer than 8 books at each price. how many books did cam buy?

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)

What is fraction that is equivalent to 3/8