 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:
, o u6 Q3 d5 E/ g% H$ D3 h! F% iset small watermelon: x, middle watermelon y and big watermeton z( r/ M! V+ i$ Y. _
4 k! z' z4 y3 E K
two simultaneous equations are set up:
! q \5 f0 K4 c) @) O; i( ~( b0.5x+2y+5z=50 (1)* w+ i q4 d: J8 v% q! n. @9 v
x+y+z=50 (2)/ u3 S ]* p6 L" H+ }& t: t. U
Equation(1) means that the total amount paid is equal t ... 0 i: P5 B5 w- ^* P, [
:lol::lol:
3 B6 d" k4 z# D3 S4 d4 z, |楼主的标题就是给你写的!, K& G U. R0 h4 {6 ?0 s j/ ?) H! l
你看看我们智力超群的同学们回答的都多好啊! |
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