Question

Does anyone know this answer

Answer 1

`(1)/(a) = (1)/(b) + (1)/(c) \\ \\ (1)/(12) = (1)/(b) + (1)/(22) \\ \\ (1)/(b) = (1)/(12) - (1)/(22) \\ \\ (1)/(b) = (11)/(132) - (6)/(132) \\ \\ (1)/(b) = (11 - 6)/(132) \\ \\ (1)/(b) = (5)/(132) \\ \\ 5b = 132 \\ \\ b = (132)/(5) \\ \\ b = 26.4 \\ \\ b = 26`

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