Answer:
f=4
Step-by-step explanation:
Priya Tried to solve the equation below step-by-step:

The steps are correct and indeed f=4.
Hello from MrBillDoesMath!
Answer:
Suppose the ordered pair is (x.y). Substitute these values in the linear equality to see if it is true,
Example. Consider the point (7, -4). Is it a solution of the linear inequality
3x < 4y - 9? Let's check to find out.
Check:
Is 3 (7) < 4 (-4) - 9 true ?
Is 21 < -16 -9 = -25 ??
NO!
So (7,-4) is NOT a solution of the linear inequality.
Thank you,
MrB
Answer:
I believe it is not. that would mean 7=-3+15 and therefore 7=12, which is not a true statement.