已知a:b:c=4:5:6求2a+3b-2c分之3a-2b+c的值帮忙回答一下.
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已知a:b:c=4:5:6求2a+3b-2c分之3a-2b+c的值帮忙回答一下.
已知a:b:c=4:5:6求2a+3b-2c分之3a-2b+c的值
帮忙回答一下.
已知a:b:c=4:5:6求2a+3b-2c分之3a-2b+c的值帮忙回答一下.
(3a-2b+c)/(2a+3b-2c)
=(3×4-2×5+6)/(2×4+3×5-2×6)
=8/11
设a=4k,b=5k,c=6k
则(3a-2b+c)/(2a+3b-2c)
=(12k-10k+6k)/(8k+15k-12k)
=(8k)/(11k)
=8/11