 鲜花( 634)  鸡蛋( 5)
|
Originally posted by knptmug at 2005-4-20 09:47 PM:0 p, S8 W/ q) w7 X
set small watermelon: x, middle watermelon y and big watermeton z, }3 S# ^$ p7 M1 T+ v) P% @( h
' l \3 {; Z, @5 d4 l
two simultaneous equations are set up:0 U' `2 d( K4 B" \; p4 F
0.5x+2y+5z=50 (1)
0 M) |5 y; g; H7 y& P/ P# [# `9 Mx+y+z=50 (2)4 E% Z' P+ B+ j* I7 s* R
Equation(1) means that the total amount paid is equal t ... + \, N c% l# I z5 P
:lol::lol:
" ~! W% l5 w0 j7 X2 r* R$ n楼主的标题就是给你写的!0 s) p# D9 Q* _/ x- e R
你看看我们智力超群的同学们回答的都多好啊! |
|