 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:
: W7 w6 j* h; j8 \* Z7 G. Zset small watermelon: x, middle watermelon y and big watermeton z. y. d8 W$ e) [9 F3 U W: k
4 P6 Q" E) I6 z4 G1 j0 ]
two simultaneous equations are set up:2 b" _( ]7 W# Q" T, h, A2 R
0.5x+2y+5z=50 (1)
: D% h5 e' B: ]* c0 vx+y+z=50 (2)- a! L* C! v4 P# G
Equation(1) means that the total amount paid is equal t ... % u, U3 l, J8 d6 n" A5 N; \
:lol::lol:+ }' x7 v2 T8 T. ~0 N [1 D4 K: ^
楼主的标题就是给你写的!
5 a$ A! h- v% N# n你看看我们智力超群的同学们回答的都多好啊! |
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