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<a+<b+<c= 180
2x+5+25+3x=180
2x+3x = 180-25-5
5x = 150
5 5
x = 30
<a = 2x+5 = 2(30) + 5
= 60 + 5
= 65
5x + 30 = 180
5x = 180-30
5x = 150
x = 30
A = 2x + 5 = 2 (30) + 5 = 60 + 5 = 65 derajat