a :b=3:4,b:c=5:6,则a:c=( ):( )

已知A=5a-3b,B=-6a+4b,则A-B等于 A.-a+b,B=11a+b C.11a-7b D -a-7b a:b=5:6,b:c=4:3,求b-c分之a+b 若a:b:c=4:5:6则2a+3b-c/2a-3b+c= 设实数a,b,c满足c+b=3a*a-4a+6,c-b=a*a-4a+4,则a,b,c的大小关系是?Ａ,a小于b小于等于c Ｂ,b小于a小于等于c Ｃ,b小于c小于等于a Ｄ,c小于a小于等于b 已知a+b/2=b-2c/3=3c-a/4,则5a+6b-7c/8a+9b=_________ (a+b):(b+c):(c+a)=3:4:5 求a:b:c 已知a:b=3:5,b:c=6:7,则a:b:c= a :b=3:4,b:c=5:6,则a:c=( ):( ) 已知A:B=5:3,B:C=7:4则A:B:C= a：b=2：5,b：c=3：4,则a：b：c= 已知A:B=5:6,B:C=3:4,那么A:B:C=( ):( ):( ) A:B=4:3,B:C=5:6,求Ａ：Ｂ：Ｃ＝? (4a-5b)^2+(c-3b)^4=o,则a:b:c 3a-c=4a+2b-c=a+b+c a:b:c 4b+a=6a=5c ,则a:b:c是多少? a+2b+3c=5,4a+3b+2c=10,则a+b+c=?, 已知a:b:c=4:5:6,并且a+2b+3c=64,a+b+c=? a+2b+3c=5 3a+2b+c=-4则a+b+c等于?