Cevaplar

2012-12-04T18:25:35+02:00

a+b/2=10

a+b+c/3=15

a+b=20

a+b+c=45

c=45-20=25

0
2012-12-04T18:25:45+02:00

10x2=20 15x3=45 45-20=25=c

0