a = 30%(a+b) = 30(a+b) / 100 = (3a+3b) / 10, sau 10a = 3a + 3b, sau 7a = 3b, deci b = 7a/3 = 700a / (300b) = 700a/3 *(1/100) = 233,(3)a/100=233,33%a.
Green eyes.
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a = 30%(a+b) = 30(a+b) / 100 = (3a+3b) / 10, sau 10a = 3a + 3b, sau 7a = 3b, deci b = 7a/3 = 700a / (300b) = 700a/3 *(1/100) = 233,(3)a/100=233,33%a.
Green eyes.