 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:
+ i' q* [% n ~( B5 m3 Z: u8 rset small watermelon: x, middle watermelon y and big watermeton z: x, j4 }" D5 E& B5 a
3 [9 w: r" g* h; \2 _9 [two simultaneous equations are set up:
+ c) V) R. I* [& o0.5x+2y+5z=50 (1)
) j! _3 J: s! h! h/ \x+y+z=50 (2), g6 D: q% ]$ y. K# s8 Z/ M
Equation(1) means that the total amount paid is equal t ...
/ a+ C. [' q3 A, s7 W+ `:lol::lol:
( P6 W* Q/ \! P0 ~& g* G8 Y( T楼主的标题就是给你写的!1 d, H) N# U* l6 c, ~% s0 R; f6 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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