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Verified answer
Misal byk anak kelompok semula = a7,5 = ( a × 7 ) + ( 3 × 8 ) / ( a + 3 )
7,5 ( a + 3 ) = 7a + 24
7,5a + 22,5 = 7a + 24
7,5a - 7a = 24 - 22,5
0,5a = 1,5
a = 3
jadi byk anak semula = 3