Răspunsuri

2014-11-03T09:26:30+02:00
A*b=1530     ⇒ a=1530/b
(a-20) *b = 850

a-20=850/b
a= 850/b+20
1530/b=850/b+20   inmultim cu b
1530=850+20b
680 = 20 b
b=34
a=45