Răspuns :
a+b+c=1988
b:a=3 inseamna ca b=3·a
c:b=2 rest 108 inseamna ca c=b·2+108
a+b+c=1988
a+3·a+2·b+108=1988
4·a+2·(3·a)+108=1988
4·a+6·a+108=1988
10·a+108=1988
10·a=1988-108
10·a=1880
a=1880:10
a=188
b=3·a
b=3·188
b=564
c=2·b+108
c=2·564+108
c=1128+108
c=1236
b:a=3 inseamna ca b=3·a
c:b=2 rest 108 inseamna ca c=b·2+108
a+b+c=1988
a+3·a+2·b+108=1988
4·a+2·(3·a)+108=1988
4·a+6·a+108=1988
10·a+108=1988
10·a=1988-108
10·a=1880
a=1880:10
a=188
b=3·a
b=3·188
b=564
c=2·b+108
c=2·564+108
c=1128+108
c=1236