Răspunsuri

2014-11-17T19:45:32+02:00
A-b=53
a=2b+21
2b+21-b=53 | -21
b=53-21
b=32
a-32=53
a=53+32
a=85
1 5 1
2014-11-17T19:46:19+02:00
A-b=53
a=2b+21
2b+21-b=53
b+21=53
b=53-21
  =32
a=32x2+21
  =64+21
  =85
85-32=53

1 5 1