Originally posted by knptmug at 2005-4-20 09:47 PM: 3 K# v8 k% ?5 M- Hset small watermelon: x, middle watermelon y and big watermeton z6 Z) Z) P5 i, b( |, ?& [
0 A1 W$ T1 g8 e- j) z
two simultaneous equations are set up: 9 | C9 O' i/ Y8 _7 w0.5x+2y+5z=50 (1) / g3 {: Q8 I8 ?" o. R" ~' zx+y+z=50 (2)" Q: T3 K/ l3 B" M
Equation(1) means that the total amount paid is equal t ...