Răspunsuri

2014-07-18T14:01:56+03:00
A:b=2 rest 7
a=2b+7

4a-8b-1= 4(2b+7) -8b-1= 8b+28 -8b -1   se reduc 8b si -8b si ramane

28-1= 27= 3³  -cctd
22 4 22