Use an inequality:
S = sum
7 + 7 < S < 8 + 9
14 < S < 17
so the sum is between 14 and 17
7 is subtracted from a number y. y-7
Then the result is multiplied by 3. 3*(y - 7)
The final answer is less then or equal to 12. 3*(y - 7)≤12
3*(y - 7)≤12
y-7≤4
y≤ 11
Answer:

Step-by-step explanation:

Sum = -4
Product = 1
Factors = -1 , -1

Hope you could understand.
If you have any query, feel free to ask.