Originally posted by knptmug at 2005-4-20 09:47 PM:6 c" E i0 j" l
set small watermelon: x, middle watermelon y and big watermeton z 1 q5 T4 \: h. ?% N1 z' c$ m( ]6 R4 Q, R# |# o7 A8 g; P- ?
two simultaneous equations are set up: ) Z6 R6 y; _8 ~$ \9 j0 ~0.5x+2y+5z=50 (1) " @5 f- d8 K# Ix+y+z=50 (2)& Z- b7 K9 |! t$ D `
Equation(1) means that the total amount paid is equal t ...