 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:0 _, R# a' Y2 Q3 }4 l
set small watermelon: x, middle watermelon y and big watermeton z
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9 e5 r% F7 W9 M6 e. Y2 Htwo simultaneous equations are set up:" _" v& n, o8 k6 s- Y
0.5x+2y+5z=50 (1)
! N- n, f% m& ~. _0 V# Tx+y+z=50 (2)
& u# `# |1 w% Z9 ^* @Equation(1) means that the total amount paid is equal t ... & J4 M) Y4 W0 u/ u' s. x
:lol::lol:
# Q" m0 \& X: O/ R: a. F# r. d楼主的标题就是给你写的!
. K; m- O# s2 ^+ f; 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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