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已知x/2=y/3=z/4不等于0,求x+y+3z/3x+2y的值
人气:318 ℃ 时间:2020-03-30 22:02:10
解答
解设x/2=y/3=z/4=k
即x=2k,y=3k,z=4k

x+y+3z/3x+2y
=(2k+3k+3×4k)/(3×2k+2×3k)
=17k/12k
=17/12
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