x+y=1200
[tex] x+ (\frac{8}{100} *x) +y+(\frac{10}{100} * y) = 1308
aduci la acelasi numitor si
100x+8x+100y+10y=1308 * 100
108x+110y=130800
acuma ai doua sisteme si anume:
x+y=1200
108x+110y=130800
scrii pe x in functie de y :
x=1200-y
si inlocuiesti in a doua ecuatie
108(1200-y) + 110y=130800
129600 - 108y+110y = 130800
129600 + 2y= 130800
2y=130800 - 129600
2y=1200
y=600
si in locuiesti in prima ecuatie:
x+600=1200
x=600[/tex]
