 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:
+ D. B$ j2 A. @% tset small watermelon: x, middle watermelon y and big watermeton z0 y4 q7 {. G) T3 }
+ ]' q% l3 d Z$ L4 j, h" o3 e" F
two simultaneous equations are set up:
! E; C L+ V% x$ Y! u0.5x+2y+5z=50 (1)
$ Y, Z* U% Z. a/ w o/ W P- \/ Ux+y+z=50 (2)% y7 g$ Q$ M* J
Equation(1) means that the total amount paid is equal t ... ' `3 e( ?3 ^* Q- O1 i
:lol::lol:
; s9 e7 l+ S, L$ a' N楼主的标题就是给你写的!
9 i0 Q6 ]4 r6 ?' F, u1 a6 v6 J, Y! Z你看看我们智力超群的同学们回答的都多好啊! |
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