
Taking 4 out from first two terms, we will get

Now we divide the coefficient of x by 2 and add and subtract the square of the result, we will get

Distributing 4

Cancelling 9

And that's the required standard form.
Your answer is 75, hope this helps you!
Answer:
W=24
Step-by-step explanation:
2K(9W-18V)=3X+15Y
-12=21
21/23=X-Y-V
=23
=23+1=24
24