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B = Ibu
A + B = 230
B = 230 - A
A+10 = 3/5 B
A+10 = 3/5 (230 - A)
5(A + 10) = 3(230 - A)
5A + 50 = 690 - 3A
5A + 3A = 690 - 50
8A = 640
A = 80
B = 230 - 80 = 150
selisih B - A = 150 - 80 = 70