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(1) V = T - n
(2) V = 4n
(3) T - V = 8
Persamaan 1 dan 3 sebenarnya sama.
(1)
V = T - n
n = T - V
(3)
T - V = 8
8 = T - V
Jadi, n = 8
Umur vera = 4 = 4(8) = 32 tahun
8 = T - V
8 = T - 32
8 + 32 = T
T = 40