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= 3(2b-3)+5
= 6b-9+5
=6b-4
maaf kalau slh
D2 : f(2b-3) = ?
D3 : f(x) = 3x + 5
Maka, f(2b-3) = 3x + 5
= 3(2b-3)+5
= 6b-9 + 5
= 6b-4
Jadikan jawaban terbaik ya..:v