Răspunsuri

2014-02-07T20:54:32+02:00
B+x=450
2b-x=450
le aduni si obtii:3b=900=>b=300
2014-02-07T20:58:36+02:00
Notam bursa cu b,deci :
b+x=450
2b-x=450 ,le adunam
3b=900
b=900:3
bursa=300 lei