Cevaplar

2013-02-10T16:57:29+02:00

Eksilen-Çıkan=20

Çıkan=x

Eksilen=2x-30

2x-30-x=20 

x-30=20

x=50 (çıkan)

Eksilen=2x-30

2.50-30

100-30=70 

Eksilen=70

0
2013-02-10T17:47:22+02:00

x-y=20

2y-30=x

 

x-y=20                       2x-2y=40

-x+2y=30                  -x+2y=30

       =  x=70

0