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3x - 9 + 2x + 4 = 90'
5x - 5 = 90'
5x = 95
x = 19
Sudut P = 3(19) - 9 = 48'
Sudut Q = 2(19) + 4 = 42'
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5x-5 = 90
5x= 90+5
x= 95/5 = 19
Maka p = 3x-9 = 3 X 19 - 9= 48