what is the value of x? x°-4 100° 3x°

Answer:
x = 21
Step-by-step explanation:
The sum of interiro angles in atriangle is equal to 180:
x - 4 + 100 + 3x = 180 add like terms
4x + 96 = 180 subtract 96 from both sides
4x = 84 divide both sides by 4
x = 21