જો (a + b + c) : d = 8: 1, (b + c + d) : a = 9: 1 અને (c + d + a) : b = 4 : 1 હોય, તો a : b : c : d શોધો?

1
9 : 18 : 10 : 10
2
9 : 18 : 53 : 10
3
7 : 5 : 9 : 6
4
4 : 6 : 5 : 7

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