ex. 11 ajutati ma va rog

a+b+c+d=600 000
a=90 106
b=67 905+90106
b=158011
c=90106+158011
c=248117
90106+158011+248117+d=600000
248117+248117+d=600000
496234+d=600000
d=600000-496234
d=103766