Răspunsuri

2014-10-04T21:11:27+03:00
Oana  - a , Anita - b
5b = a
a - 220 = b + 220
5b - 220 = b + 220 / + 220
5b = b +  440
4b = 440
b = 440 : 4
b = 110
5 * 110 = 550 ( Oana ) 
2014-10-04T21:16:22+03:00
X-oana 5x-anita 5x-220=x 5x-x=220 4x=220 x=55(oana) 5•x=275
1 5 1