find the value of x. then find the angle measures of the triangle...

Answer:
x = 35
105°, 40°, and 35°
Step-by-step explanation:
A triangle has 180°
180° - 40° = 140°
3x + x = 4x
4x = 140
4x /4 = 140 /4
x = 35
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x * 3 = 105°
40°
x = 35°