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jednodušší řešení - 2 rovnice, Chozze, 2012-07-28 17:02:01 Reply
Uvažujeme-li, že první dostal x tak druhý x + y a dále můžeme psát :
1) x 2) x+y 3) x+2y 4) x+3y 5) x+4y Vzniknou dvě rovnice o dvou neznámých: I. 5x + 10 y = 100 II. (2x + y)*7 = 3x + 9y I. 2y = 20-x II. 11x = 2y z první do druhé x = 1 2/3 y = 9 1/6 a už jenom sčítat Total: 1
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