Answer:
6. 
7. 
8. 
9. 
Step-by-step explanation:
6. The quotient of a number and -4 is -9
"The quotient of a number and -4" can be translated to 
"Is -9" can be translated to 
This means that the problem can be written as 
To solve for x, we need to multiply each side by -4.

7. Twice a number is -10
"Twice a number" can be translated to 
"Is -10" can be translated to 
This means that our equation is 
To solve for x, we need to divide each side by 2

8. Three times a number is 12
"Three times a number" can be translated to 
"Is 12" can be translated to 
This means that our equation is 
To solve for x, we need to divide each side by 3

9. Cade has a football trading card collection. He decided to share his collection with 5 of his friends. If each friend received 12 cards, how many cards did Cade have to share with his friends?
"Share his collection with 5 of his friends" can be translated to just 5
"If each friend received 12 cards" can be translated to 
"How many cards did Cade have to share with his friends" can be translated to =x
This means that our equation is 
To solve, we just need to multiply the terms.
