Răspunsuri

2014-04-01T14:52:08+03:00
A:b=6,3
a=6b+3

a+b+6+3=54
a+b+9=54
a+b=54-9
a+b=45

6b+3+b=45
7b=45-3
7b=42
b=6
a=6x6+3
a=36+3
a=39