a + 20 = 3 (180-a)
a + 20 = 540 - 3 a
4 a = 520
a = 130
180-a = 50
An angle is 20 degrees less than thrice it's supplement. Find the measures of these angles
2 answers
X+20=3 (180-x)
X+20=540-3x
X+3x=540-20
4x=520
X=520/4
X=130
X+20=540-3x
X+3x=540-20
4x=520
X=520/4
X=130