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El dato dice que:
A = 2B
A-34 = 5(B+34)/11 ---> reemplazando
2B - 34 = 5B/11 + 5*34/11
2B - 5B/11 = 34 + 5*34/11
17B/11 = 34*16/11 , simplificando
B = 32 quetzales ---------> A = 2*32= 64 quetzales