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2.) a + 2 + a + 4 = 72
2a + 6 = 72
2a = 72 - 6
2a = 66
a = 66/2 = 33
a+ 4 = 33 + 4 = 37
maaf klau salah....!
2.72=4a+2+4+6
72-12=60
60=4a
a=60/4=15
15+17+19+21 = 72
maka bilangan ganjil berurutannya
ialah.urutan ke 1 =a=15
2=a+2=17
3=a+4=19
4=a+6=21
jumlah terbesar terkecilnya ialah 15+21= 36