1.
a+b=8
a≠b≠0
a>b
7+1=8
6+2=8
5+3=8
a+b+c=8
a≠b≠c≠0
a>b>c
5+2+1=8, 5>2>1
4+3+1=8, 4>3>1
2.
[tex]\overline{ab}+\overline{cd}=47\\\\\overline{ba}+\overline{dc}=173[/tex]
Le scriem in baza 10:
10a+b+10c+d=47
10b+a+10d+c=173
Le adunam:
11a+11b+11c+11d=220
Dam factor comun:
11(a+b+c+d)=220 |:11
a+b+c+d=20
a,b,c,d cifre
a+c=3
b+d=17
I.
18+29=47
81+92=173
II.
19+28=47
91+82=173
Un alt exercitiu asemanator gasesti aici: https://brainly.ro/tema/136061
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