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porque axb=18
a=18/b
a=2b
18/b=2b
b=3 18/3 = 6 y 2b= 2#3= 6
a = 2b...........(2)
Sustituyendo " a" en (1):
2b · b = 18
2b² = 18
b² = 18 / 2
b² = 9
√b² = √9
b = 3
Sustituyendo el valor numérico de "b" en (2):
a = 2 (3)
a = 6
Luego : aba + bab
636 + 363 = 999