Cevaplar

2013-02-03T18:19:23+02:00
X+Y=81 X=2y+6. Diye gidiyo sanırım
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2013-02-03T18:21:42+02:00

X+y: 81 

y:2x+6 

81-6:3x

81-6:75

3 x: 75

75/3: 25

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