Jika f(a) = 5a-6 dan f(b+1) = 19,maka nilai b adalah...
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Jika f(a) = 5a-6 dan f(b+1) = 19,maka nilai b adalah...
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1. Jawaban Anonyme
Bab Fungsi
Matematika SMP Kelas VIII
f(a) = 5a - 6
f(b + 1) = 5 (b + 1) - 6 = 19
5b + 5 = 19 + 6
5b = 25 - 5
b = 20/5
b = 4