This makes no sence number 1 what?
180 is the total for any triangle, therefore if you take 180-90-15, you’ll get 75 remaining; 75 being your third angle.
First we add by 4, so the equation would look like this:

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Then we multiply by 8 so it looks like this:

.
So the answer would be:
w = 192.Hope this helped! c: