已知3x=2y=5z≠0,求(x+2y+3z)÷(x-y+z)急具体算式、!
问题描述:
已知3x=2y=5z≠0,求(x+2y+3z)÷(x-y+z)
急
具体算式、!
答
58
答
设3x=2y=5z=k
∴x=k/3,y=k/2,z=k/5
(x+2y+3z)÷(x-y+z)
=(k/3+2k/2+3k/5)÷(k/3-k/2+k/5)
=29k/15 ÷ k/30
=58.