太简单了吧?6 j& D2 G6 @0 `6 M% |' u |7 B
V& c% O, M4 e' Q& B) o' z" q
小西瓜1元2个, 一个就是5毛,50个就是 5*50, 五五三十五,三十五块买了50各西瓜, 15块小费。- I1 g( c# W3 a M; ~
. F( N l2 q0 ^: \
下一个问题,这50个西瓜怎么分?
Originally posted by knptmug at 2005-4-20 09:47 PM:9 |: w5 D: T$ H$ Y! j% a" S! ^
set small watermelon: x, middle watermelon y and big watermeton z+ E$ f. M" t' X9 K, W
) o# c0 ~+ f+ u! s1 ^- N% [6 Jtwo simultaneous equations are set up: . A" A1 R6 }) s! o) M0.5x+2y+5z=50 (1): O& D a# @# z8 A& S
x+y+z=50 (2)6 |3 W8 o' v* v8 L9 S8 [
Equation(1) means that the total amount paid is equal t ...