 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:
( `, N, ~2 O* P4 k7 G d9 ?6 oset small watermelon: x, middle watermelon y and big watermeton z
# }5 ?0 K* U4 i5 `) c' `: J4 s( n, V
two simultaneous equations are set up:
* G/ e6 l- I" @) b% X U3 e0.5x+2y+5z=50 (1)' ~% I" @) S8 R* c) D, n7 ~
x+y+z=50 (2); i% {0 S6 `/ J4 {. s% y7 C3 l
Equation(1) means that the total amount paid is equal t ... $ a5 ~8 L1 {; _ C6 q0 e
:lol::lol:
7 \6 f" d4 P# V楼主的标题就是给你写的!
- l2 e* I7 }2 [" a& ]9 }你看看我们智力超群的同学们回答的都多好啊! |
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