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Daca a a +b b=143, calculati a + b

Răspuns :

10a+a+10b+b=11a+11b=11(a+b)
11(a+b)=143
a+b=143:11=13
as simple as that!!!
aa+bb=143

10a+a+10b+b=143

11a+11b=143

11(a+b)=143

a+b=143:11

a+b=13