Answer:
x = 21 degrees!
Step-by-step explanation:
3x + x + 96 = 180
4x +96 = 180
Subtract 96 from both sides!
4x = 84
Divide by 4 from both sides!
x = 21 degrees
x=21°
3x+x+96°=180°
4x=180°-96°
4x=84°
x=84°/4
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