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288 + 2× / 50 = 6,06
288 + 2× = 6,06 × 50
288 + 2× = 303
2× = 303 - 288
× = 15 ÷ 2
× = 7,5
jd, nilai rata rata 2 orang tersebut adalah 7,5
__________
50
6,06.50 = 288 + 2x
303 = 288 + 2x
303 - 288 = 2x
15 = 2x ------->> x = 15/2 = 7,5
jadi,nilai rata2 dua org terakhir adalah 7,5