若a:b:c=2:3:4,且a+b+c=18 則a= b= c=
若a:b:c=2:3:4,且a+b+c=18 則a= b= c=
數(shù)學(xué)人氣：300 ℃時間：2020-05-07 18:33:12
優(yōu)質(zhì)解答
以為a：b：c=2：3：4,a+b+c=18,設(shè)a為2X,b為3X,c為4X,得2X+3X+4X=18,9X=18,X=2.所以a=2X=4,b=3X=6,c=4X=8算完了
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