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PEMBAHASAN
Diketahui :
f(x) = 3x - 5
f(y) = -14
Ditanyakan :
y = .... ?
Jawab :
f(x) = 3x - 5
f(y) = 3y - 5
Kita substitusikan f(y) = -14
f(y) = 3y - 5
-14 = 3y - 5
-3y = -5 + 14
-3y = 9
y = 9/(-3)
y = -3
Jadi nilai y adalah -3
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Untuk contoh soal lainnya, bisa dilihat di link berikut
brainly.co.id/tugas/17341472
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Kelas : 8
Mapel : Matematika
Kategori : Fungsi
Kata Kunci : Nilai Fungsi
Kode : 8.2.2