Răspuns:
dau coroana la cine face ex asta.iuhuuuu
[tex]20/100*x=x/5-prima.zi\\\\x-x/5=4x/5-rest\\\\4x/5*15/100=3x/25-a2a.zi\\\\x/5+3x/25+3x/25+6+50=x\\\\numitor.comun.-25\\\\5x+3x+3x+150+1250=25x\\\\1400=25x-11x\\\\x=1400:14\\\\x=100lei-suma.lui.Marius[/tex]
