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A= 2/5(b+c) ; b= 1/4(a+c) then a:b:c=?

Science & Mathematics by Anonymous 2018-06-01 16:04:58

Social Science

A= 2/5(b+c) ; b= 1/4(a+c) then a:b:c=?

1 answer

  • Anonymous

    b+c=5a/2------(1) 4b-c=a--------(2) (1)+(2)=> 5b=5a/2+a=> 5b=7a/2=> b=7a/10-----(3) putting (3) into (2), get c=4b-a=> c=4b-10b/7=> c=18b/7 Thus, a/b=10/7 & b/c=7/18 => a:b:c=10:7:18

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