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2014-05-04T23:50:35+03:00
X-lei kg portocale
y-lei kg banane

4x+3y=69000    4x=69000-3y   x=(69000-3y)/4
5x+2y=67000

5.(69000-3y)/4+2y=67000
5(69000-3y)+8y=67000.4
345000-15y+8y=268000
7y=77000
y=11000 lei/kg
x=(69000-33000)/4=9000 lei/kg
11000+9000=20000 lei 1kg portocale+1kg banane
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