Question

si 23x sobre base 5=72 sobre base 9 calcular x
tengo 5 alternativas
a 0
b 6
c 2
d 3
e 5

Answer 1

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23x ₍₅₎ = 72₍₉₎

23x₍₅₎ = 2 . 5² + 3 . 5 + x = 65 + x
72₍₉₎ = 7 . 9 + 2 = 65

65 + x = 65
x = 0