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B= 2/3 C => B:C = 2:3
SELISIH B &C = 18
B= 2/1X 18 = 36
C = 3/1X 18 = 54
A= 4/3X36 = 48
A + B + C = 48 + 36 + 54 = 138
C-2/3 C=18
3/3 C-2/3 C =18
1/3 C =18
C=54
B= 2/3 C =2/3 . 54 =36
A : B = 4 : 3
A= 4/3 . 36
A=48