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y--->waga konia
2x+y=1510
x+2y=1430
y=1510-2x
x+2(1510-2x)=1430
x+3020-4x=1430
-3x=-1590|:(-3)
x=530kg
y=1510-2x
y=1510-2*530
y=1510-1060
y=450kg