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x: le robaron
1500-x: no le robaron
planteando:
x = 2/3(1500-x)
x = (3000-2x)/3
3x = 3000-2x
5x = 3000
x = 600
le robaron $600 :)
2x/3= lo q le robaron
x+2x/3=1500
5x/3=1500
x=900
2x/3=600
por lo tanto le robaron 600