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r = banyak uang Rama
d = banyak uang Dinda
Dik: a = .r
r = .d
a + r + d = 500.000
Dit: a = ...?
Jwb:
r = .d
a = .r
= .(.d)
= .d
a + r + d = 500.000
.d + .d + d = 500.000
.d = 500.000
.d = 500.000
d = 500.000 x
a = x 500.000 x
=
= 105.263,15
Jumlah uang Amanda, Rp105.263,15