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22 = a + 6b
U12 = a + 11b
37 = a + 11b
eliminasikan
37 = a + 11b
22 = a + 6b -
15 = 5b
15 : 5 = b
3 = b
cari a
22 = a + 6b
22 = a + 6(3)
22 = a + 18
22-18 = a
4 = a
maka
U14 = a + (14-1)b
U14 = 4 + (13 x 3)
U14 = 4 + 39 = 43
U12=37
U14=...?
mencari A dan B terlebih dahulu
B=37-22 =15 =3
12-7 5
A=U12 ->a+(n-1)b=37
a+(12-1)3=37
a+(11x3)=37
a+33=37
a=37-33
a=4
U14=a+(n-1)b
4+(14-1)3
4+(13x3)
4+39
43