Originally posted by knptmug at 2005-4-20 09:47 PM: " J9 r7 G. n- V, z- x2 o8 }set small watermelon: x, middle watermelon y and big watermeton z 7 z. s2 d4 P; H9 { & \4 Y& ]' E; y9 itwo simultaneous equations are set up: ! Z& t0 N1 l h0.5x+2y+5z=50 (1) 7 i4 Y1 |3 _; G5 e9 K. x" \7 ox+y+z=50 (2), z( `, Y) `& e$ \& p
Equation(1) means that the total amount paid is equal t ...