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6x + 60 = 180 derajat
6x = 180 - 60 derajat
6x = 120 derajat
x = 120 / 6 derajat
x = 20 derajat
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P = 4x + 20
= 4.20 + 20
= 80 + 20
= 100 derajat
Q = x
= 20 derajat
R = x+ 40
= 20 + 40
= 60 derajat