{2a-5b-c=0 a+5b-3c=0}求a:b:c

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{2a-5b-c=0a+5b-3c=0}求a:b:c{2a-5b-c=0a+5b-3c=0}求a:b:c{2a-5b-c=0a+5b-3c=0}求a:b:cc=2a-5bc=1/3(a+5b)C=Ca

{2a-5b-c=0 a+5b-3c=0}求a:b:c
{2a-5b-c=0 a+5b-3c=0}求a:b:c

{2a-5b-c=0 a+5b-3c=0}求a:b:c
c=2a-5b c=1/3(a+5b) C=C a=4b c=3b 4:1:3