[tex]\overline{ab} + \overline{a3} = 85\\\overline{ab} + \overline{ba} = ?\\[/tex]
10a+b+10a+3=85
20a+b+3=85
Stiind ca a,b sunt cifre din multimea {0,1,2,3,4,5,6,7,8,9} rezulta ca :
20a=80
b+3=5
20a=80 => a=4
b+3=5 => b=2
[tex]\overline{ab} = 42\\\overline{ba} = 24[/tex]
Deci,
[tex]\overline{ab} + \overline{ba} = 42+24= 66[/tex]
