Răspuns:
a+b+c=117
a:b=3 rest 4
a=3b+4
b:c=4 rest 7
b=4c+7
a=3x(4c+7)+4
a=12c+21+4
a=12c+25
12c+25+4c+7+c=117
17c+32=117
17c=117-32
17c=85
c=85:17
c=5
b=4x5+7
b=27
a=12x5+25
a=60+25
a=85
v:85+27+5=117
Explicație pas cu pas:
