求大神助攻

summercc · 发表于 2014-10-31 11:08:41

GWD数学

Acertain dealership has a number of cars to be sold by its salespeople. How many cars are to be sold?

(1) Ifeach of the salespeople sales 4 of the cars, 23 cars will remain unsold.

(2) Ifeach of the salespeople sales 6 of the cars, 5 cars will remain unsold.

这题为什么选C呀。。。。求解！！！！！！！

veronica143 · 发表于 2014-10-31 11:24:05

应该是相当于解二元一次方程吧，设人数为X，车为Y
4X+23=Y 6X+5=Y
单独是无法解出X和Y的，两个一起就可以解出来了，所以选C

summercc · 发表于 2014-10-31 11:33:04

veronica143 发表于 2014-10-31 11:24
应该是相当于解二元一次方程吧，设人数为X，车为Y
4X+23=Y 6X+5=Y
单独是无法解出X和Y的，两个一起就 ...

salespeople的人数是固定的？我理解的是4X+23=6Y+5 所以解不出来

llpbrace · 发表于 2014-10-31 11:48:54

人数肯定是固定的啊lz

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