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Kelas 8 MatematikaBab Barisan dan Deret Bilangan
2 . U2 = U1 + U3
2 . (5x - 3) = 2x + 2 + 3x + 9
10x - 6 = 5x + 11
10x - 5x = 11 + 6
5x = 17
x = 17/5
b = U2 - U1
b = (5x - 3) - (2x + 2)
b = 3x - 5
b = 3 . 17/5 - 5
b = (51 - 25)/5
b = 26/5