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maka a = 36/6 = 6
B. 8/12 = b/(b+4)
8( b +4) = 12b
8b + 32 = 12b
4b = 32 ---> b=8
maka b = 8
C. 6/9 = 8/(8+c)
6 ( 8 + c) = 72
48 + 6c = 72
6c = 24 ----> c = 4
D. 12/4 = (6 + d)/d
12d = 4 ( 6 + d)
12d= 24 + 4d
8d = 24 ----> d=3
a=6 8+2b=3b 12=8+c 3d=6+d
b=8 c=4 2d=6
d=3