Answer:
-10
Step-by-step explanation:
4y+12=7-5y add 5y to both sides
9y+12=7 subtract 12 from both sides
9y=-5 divide both sides by 9
y=-5/9
Answer:
Correct choice is A
Step-by-step explanation:
Note that the denominator
Then rewrite the numerator
as 
Substitute both expression into the initial expression:

Step-by-step explanation:
The answer is letter B. Negative and Negative is Positive.