 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:; o0 D$ Z6 Z; T8 F
set small watermelon: x, middle watermelon y and big watermeton z
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two simultaneous equations are set up:
, Z8 z; ^) ^" l, ]: o' i2 c5 @4 ~0.5x+2y+5z=50 (1)6 }# f7 K+ M1 P; ?' z
x+y+z=50 (2), u# Z" z" Q8 s
Equation(1) means that the total amount paid is equal t ...
, \. ]0 f8 R8 r/ j @( J:lol::lol:
: g1 F3 h% t. i8 H3 u0 j楼主的标题就是给你写的!" _, X& C$ ^- b, T
你看看我们智力超群的同学们回答的都多好啊! |
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