Răspuns :
tel = a
tableta=b
a+b=1300=> a=1300-b
3a+4b=4400
3(1300-b)+4b=4400
3900-3b+4b=4400
b=4400-3900
b=500 lei costa o tableta
a=1300-500
a=800 lei costa un telefon
tableta=b
a+b=1300=> a=1300-b
3a+4b=4400
3(1300-b)+4b=4400
3900-3b+4b=4400
b=4400-3900
b=500 lei costa o tableta
a=1300-500
a=800 lei costa un telefon
Tel+tab=1300
3Tel+4tab=4400 inmultim prima relatie cu -3 si o adunam la adoua dispar Tel4400
-3tab +4tab=4400-3900=500⇒o tableta =500 ⇒un telefon =800
raspuns o tableta =500lei cam scumpa
3Tel+4tab=4400 inmultim prima relatie cu -3 si o adunam la adoua dispar Tel4400
-3tab +4tab=4400-3900=500⇒o tableta =500 ⇒un telefon =800
raspuns o tableta =500lei cam scumpa