Qual o valor de ๐ na equaรงรฃo: 23๐ - 16 = 24 - 17๐ โ Qual o valor de ๐ na equaรงรฃo: 20๐ - 43 = 57 โ Quais sรฃo as equaรงรตes de 1ยบ grau com uma incรณgnita?
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