Răspuns :
A+b+c=1915
B=3a
C:b=2 rest 45 => c= 2B+45=> c= 6a+45
A+3a+6a+45=1915
10a=1915-45=1870
a=1870:10=187
B=3x187=561
c=561+561+45=1167
c=b*3+45
b=a*3
c=a*3*2+45
a+3a+(3a*2)+45=1915
a+3a+6a=1915-45=1870
10a=1870
a=1870:10
a=187
b=187*3
b=561
c=561*2+45
c=1167
b=a*3
c=a*3*2+45
a+3a+(3a*2)+45=1915
a+3a+6a=1915-45=1870
10a=1870
a=1870:10
a=187
b=187*3
b=561
c=561*2+45
c=1167