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A = B
5x - 9 = 2x +36
3x = 45
x = 15
setelah diketahui nilai x maka dapat diketahui sudut A
A = 5x - 9 = 5 (15) - 9 = 75 - 9 = 66
5x - 9 = 2x + 36
3x = 45
x = 15
A = (5x - 9) = 5.15 - 9 = 75 - 9 = 66