Masukkan fungsi f (x) = 3x + 9. dan f (k) = 33, maka nilai k =
f ( x ) = 3x + 9
f ( k ) = 3k + 9 = 33
f ( k ) = 3k = 33 - 9
f ( k ) = 3k = 24
f ( k ) = k = 24/3
f ( k ) = k = 8
f ( k ) = 8
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