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0.2p + 0.02 + 0.4p - 0.04 + 0.1p - 0.05 + 0.3x = p
0.7p - 0.07 + 0.3x = p
0.3x = 0.3p + 0.07
3x = 3p + 0.7
karena x = p + q
3(p + q) = 3p + 0.7
3p + 3q = 3p + 0.7
3q = 0.7
q = 7/30 = 0.233...
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