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= 7 : 3
Umur ibu :
7 / 3 × 15
= 35tahun
5 tahun mendatang :
umur ibu = 35 + 5 = 40 tahun
umur hanum = 15 + 5 = 20 tahun
perbandingan :
ibu : hanum
40 : 20
2 : 1
2) gambar di atas
3) f (x) = 2x - 3
f (b) = 5
= 2x - 3 = 5
= 2x = 5+3
= 2 x = 8
= x = 8/2
= x = 4
jadi, nilai b = 4