Răspunsuri

2014-11-01T09:02:50+02:00
A:c=10r5 =>a=10c+5
b:c=5r4 =>b=5c+4
Le inlocuim in a+b+c=121
10c+5+5c+4+c=121 => 16c+9=121 => 16c=121-9 =>16c=112 => c=7
a=10c+5 => a=70+5 =>a=75
b=5c+4 =>b=35+4 => b=39