Let m be the angle's measure. Then its supplement is 180 - m.
3(180 - m) + 40 = m
540 - 3m + 40 = m
580 - 3m = m
580 = 4m
m = 145
Therefore, the angle's measure is 145 degrees.
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Let m be the angle's measure. Then its supplement is 180 - m.
3(180 - m) + 40 = m
540 - 3m + 40 = m
580 - 3m = m
580 = 4m
m = 145
Therefore, the angle's measure is 145 degrees.