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if a:(b+c) = 1:3 and c: (a+b) =5:7 then find the value of b:(a+c) .

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The answer is b:(a+c) =1:2 , it is solved out using the properties of invertendo, componendo and dividendo properties of "RATIO & PROPORTION"
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we will get two equations 1.3a=b+c and 2.7c=5a+5b in 2nd equationn put b=3a-c from 1st equation then we get 3c=5a put c=5a/3 in 1st equation we get 4a =3b now we have b=4a/3 and c=5a/3 put this in the ratio b/a+c and get the ans as 1/2 ie 1:2
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a:(b+c)=1:3andc:(a+c)=5:7 then find the value of (a:b:c)
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a:(b+c)=1:3,c:(a+b)=5:7 (1:3)12=12:36 (5:7)4=20:28 b:(a+c)=16:(12+20)=1:2
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