Originally posted by knptmug at 2005-4-20 09:47 PM: 5 A5 q }% V% b8 u" s' V* uset small watermelon: x, middle watermelon y and big watermeton z 6 s/ s! h: a1 Z5 {; X6 t; w& |# f0 ?4 ]" g
two simultaneous equations are set up: . D! E( Q" T& B% t& Z/ s0.5x+2y+5z=50 (1) ) R L$ n+ C4 ux+y+z=50 (2)3 v$ G, k' a" d7 U; e
Equation(1) means that the total amount paid is equal t ...