if a:b = 3:7 and b:c =4:9 find a:b:c
plz help
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a:b= 3:7
a:b= 12:28
b:c= 4:9
b:c= 28:63
a:b:c = 12:28:63
a:b= 12:28
b:c= 4:9
b:c= 28:63
a:b:c = 12:28:63
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