Answer: 127
Explanation:
<TWV is the sum of the other 2 angles. Create your equation
<UWV + <TWU = < TWV
n + 45 + 8n + 127 = -10n +77 >Combine like terms
9n + 172 = -10n +77 > add 10n to both sides
19n +172 = 77 >Subtract 172 from both sides
19n = -95 >Divide by 19 to both sides
n= -5 >plug back in to find angle
<TWV = -10n +77
<TWV = -10(-5) +77
<TWV = 127