Răspunsuri

2014-04-30T15:30:51+03:00
A+b=95
a-b=40⇒a=40+b
40+b+b=95
2b=95-40
2b=55
b=55/2
a=40+55/2
amplifici pe 40 cu 2
a=(80+55)/2
a=135/2
2014-04-30T15:33:07+03:00