Originally posted by knptmug at 2005-4-20 09:47 PM: 6 d Q$ F! C: B* F: S: @set small watermelon: x, middle watermelon y and big watermeton z + u- `7 o- m; h6 P4 i. Q) ^ 1 q, T+ D' \( m1 }2 q( ^5 btwo simultaneous equations are set up:2 U |$ H3 @! P( v! u. B" v _
0.5x+2y+5z=50 (1) - t1 A) g1 B2 I! A( k) C' \7 K: D# lx+y+z=50 (2) - g2 A7 X! A, DEquation(1) means that the total amount paid is equal t ...
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:lol::lol: . o+ L7 O! K# P& E楼主的标题就是给你写的!8 T) o7 T" T+ L% k2 P
你看看我们智力超群的同学们回答的都多好啊!