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Uang Sani = b
a - b = 10.000 ------> a = 10.000 + b
2b + 4a = 160.000
2b + 4 (10.000 + b) = 160.000
2b + 40.000 + 4b = 160.000
6b = 160.000 - 40.000
6b = 120.000
b = 120.000/6
b = 20.000
Jadi uang Sani adalah Rp.20.000
sani = S
ari = A
S - A = 10.000 | x4| 4S - 4A = 40.000
2S + 4 A = 160.000 |x1| 2S + 4A = 160.000
------------------------------ +
6S = 200.000
S = 33.333