Răspuns :
a-prima zi
b-a doua zi
c-a treia zi
d-a patra zi
a+b+c+d=1050
a+a+25+a+50+a+75=1050
a+a+a+a=1050-25-50-75
4a=900
a=900:4
a=225
b=a+25=225+25=250
c=a+50=225+50=275
d=a+75=225+75=300
b-a doua zi
c-a treia zi
d-a patra zi
a+b+c+d=1050
a+a+25+a+50+a+75=1050
a+a+a+a=1050-25-50-75
4a=900
a=900:4
a=225
b=a+25=225+25=250
c=a+50=225+50=275
d=a+75=225+75=300