[tex]ilosc\ sadzonek:\ 29\ szt \\ pomidory:\ x\\ ogorki:\ y \\ koszt\ sadzonek:\ 78\ zl \\\\cena\ sadzonki\ pomidorow:\ 2,4\ zl\\cena\ sadzonki\ ogorkow:\ 3\ zl\\\\\begin{cases}x+y=29\ \ |*(-3)\\2,4x+3y=78 \end{cases}\\\\\begin{cases}-3x-3y=-87\\2,4x+3y=78 \end{cases} \\+---------\\-0,6x=-9\ \ |*(-10)\\6x=90\ \ |:6[/tex]
[tex]x=15\\\\x+y=29\\15+y=29\\y=29-15\\y=14\\\\\begin{cases}x=15\\ y=14 \end{cases}\\\\odp.\ \ Pani\ Jagoda\ kupila\ 15\ sadzonek\ pomidorw\ i\ 14\ sadzonek\ ogorkow .[/tex]
