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a/5 + 1 - 6x/7 = 1
Efectuando
a/5 - 6x/7 = 1 -1
1/35(7a - 30x) = 0 35 = mcm(5, 7)
7a - 30x = 0
Reemplazando x por su valor
7a = 30x
= 30(1/6)
= 5
Despejando incógnita
7a = 5
a = 5/7 a = 5/7