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10a+10b+10c=2530 a+b=196   a+c=177

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Ionypamask
10a+10b+10c=2530
10(a+b+c)=2530
a+b+c=253⇔a+196-a+177-a=253⇒373-a=253⇒373-253=a⇒a=120
a+b=196⇒b=196-a
a+c=177⇒c=177-a
10a +10b+10c=2530 /: 10(impartim la 10) -> a+b+c=253
a+b=196 -> b=196-a
a+c=177 -> c=177-a
a+b+c=a+196-a+177-a=253
a-a-a=253-196-177
-a=-120 -> a=120
b=196-120
b=76
c=177-120
c=57