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çözümlü olsun lütfen​

Çözümlü Olsun Lütfen class=

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ErenGnncrans

[tex]a + b \: = 15 \\ a + c \: = 17 \\ b \: + \: c = 8[/tex]

[tex]a + c = 17 \\ b + c = 8 \\ - - - - - - \\ a - b = 9[/tex]

[tex]a + b = 15 \\ a - b = 9 \\ - - - - - - \\ 2a = 24 \\ a = 12[/tex]

[tex]a= 12[/tex]

[tex]b = 3[/tex]

[tex]c = 5[/tex]

[tex]12 + 3 + 5 = 20[/tex]

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