 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:. r! V: j9 Q6 Z3 [$ _, `2 n
set small watermelon: x, middle watermelon y and big watermeton z
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; W0 \' ]% |' ?( Ytwo simultaneous equations are set up:
6 c" U# q; M: \# V/ Z0.5x+2y+5z=50 (1)
: v2 f& l" J5 ^# z& A) }x+y+z=50 (2)6 d+ `; z" K0 d$ H8 i4 S2 X; k
Equation(1) means that the total amount paid is equal t ...
5 s0 Q' r0 h7 A- M, g:lol::lol:: N+ h8 ]1 F, r
楼主的标题就是给你写的!
5 P3 w) _6 V" D, v你看看我们智力超群的同学们回答的都多好啊! |
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