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(16. 5,5 + 7x) / 16 + x = 6
16 . 5,5 + 7x = 6 (16 + x)
88 + 7x = 96 + 6x
x = 8
jadi, banyak orang yang harus ditambahkan adalah 8 orang.
n2 banyak siswa ke 2
diket :
rata'' pertama = 5,5
n1 = 16 siswa
rata'' ke dua = 7
rata'' gabungan = 6
ditanya : n2 = ?
jwb:
rata'' gab. = (rata'' pertama × n1) + (rata'' ke dua × n2)
n1 + n2
6 = (5,5 × 16) + (7 × n2)
16 + n2
6 = 88 + 7 × n2
16 + n2
88 + 7n2 = 6 × 16+ n2
88 + 7n2 = 96 + n2
7n2 - n2 = 96 - 88
6n2 = 8
n2 = 8 : 6
n2 = 1,3
kalo gak salah itu jawabannya