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1000=pc₊20%pv₊60%pc
1000=pc₊20%(1000)₊60%pc
1000=100pc₊20000 ₊ 60pc
.................... ........
100 100
1000=160pc₊20000
.....................
100
100000=160pc₊20000
100000-20000=160pc
80000=160pc
500=pc
Rpta: El articulo costo S/500.
1000=x+20%(1000)+60%(x)
1000=160%(x)+200
800=160/100(x)
x=500
el articulo costo 500
espero que esto te aya ayudado