Originally posted by knptmug at 2005-4-20 09:47 PM: 7 X( {4 [# U9 A/ Tset small watermelon: x, middle watermelon y and big watermeton z & H V$ g( w- U' b7 i4 H; g1 V6 P7 _& o$ S& _! o g; g
two simultaneous equations are set up:. d) u3 |/ c$ L0 [6 Q
0.5x+2y+5z=50 (1) 5 ` g! W8 @3 s5 o, S' fx+y+z=50 (2); U/ C: t k/ S, Q- E- I& G
Equation(1) means that the total amount paid is equal t ...