Răspuns :
a-b=43⇒a=b+43
27<b<37
b=28,29,30,31,32,33,34,35,36
Deci a=71,72,73,74,75,76,77,78,79
27<b<37
b=28,29,30,31,32,33,34,35,36
Deci a=71,72,73,74,75,76,77,78,79
43+28=71
71-28=43
43+29=72
72-29=43
43+30=73
73-30=43
43+31=74
74-31=43
43+32=75
75-32=43
43+33=76
76-33=43
43+34=77
77-34=43
43+35=78
78-35=43
43+36=79
79-36=43
71-28=43
43+29=72
72-29=43
43+30=73
73-30=43
43+31=74
74-31=43
43+32=75
75-32=43
43+33=76
76-33=43
43+34=77
77-34=43
43+35=78
78-35=43
43+36=79
79-36=43